I want to install Trinity (the fork of KDE 3.x) on Ubuntu 12.04. I tried adding the PPA and doing sudo apt-get install kubuntu-default-settings-trinity kubuntu-desktop-trinity, but I got an error:

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:

The following packages have unmet dependencies:

kubuntu-desktop-trinity : Depends: ark-trinity but it is not going to be installed

                           Depends: kcontrol-trinity but it is not going to be installed

                           Depends: kcron-trinity but it is not going to be installed

                           Depends: tde-style-qtcurve-trinity but it is not going to be installed

                           Depends: tde-systemsettings-trinity but it is not going to be installed

                           Depends: tdeadmin-kfile-plugins-trinity but it is not going to be installed

                           Depends: tdebase-kio-plugins-trinity but it is not going to be installed

                           Depends: tdegraphics-kfile-plugins-trinity but it is not going to be installed

                           Depends: tdemultimedia-kfile-plugins-trinity but it is not going to be installed

                           Depends: tdemultimedia-kio-plugins-trinity but it is not going to be installed

                           Depends: tdenetwork-filesharing-trinity but it is not going to be installed

                           Depends: tdenetwork-kfile-plugins-trinity but it is not going to be installed

                           Depends: kdepasswd-trinity but it is not going to be installed

                           Depends: tdeprint-trinity but it is not going to be installed

                           Depends: kdesktop-trinity but it is not going to be installed

                           Depends: tdm-trinity but it is not going to be installed

                           Depends: kdnssd-trinity but it is not going to be installed

                           Depends: kghostview-trinity but it is not going to be installed

                           Depends: khelpcenter-trinity but it is not going to be installed

                           Depends: kicker-trinity but it is not going to be installed

                           Depends: kio-locate-trinity but it is not going to be installed

                           Depends: kmenuedit-trinity but it is not going to be installed

                           Depends: kmix-trinity but it is not going to be installed

                           Depends: knetworkconf-trinity but it is not going to be installed

                           Depends: konq-plugins-trinity but it is not going to be installed

                           Depends: konsole-trinity but it is not going to be installed

                           Depends: kpdf-trinity but it is not going to be installed

                           Depends: ksmserver-trinity but it is not going to be installed

                           Depends: ksnapshot-trinity but it is not going to be installed

                           Depends: ksvg-trinity but it is not going to be installed

                           Depends: ksystemlog-trinity but it is not going to be installed

                           Depends: twin-trinity but it is not going to be installed

                           Depends: twin-style-crystal-trinity but it is not going to be installed

                           Depends: libarts1-akode-trinity but it is not going to be installed

                           Depends: ksplash-engine-moodin-trinity but it is not going to be installed

                           Depends: sudo-trinity but it is not installable

                           Depends: qca-tls but it is not installable

                           Depends: kdbusnotification-trinity but it is not going to be installed

                           Depends: gtk-qt-engine-trinity but it is not going to be installed

                           Depends: qt4-tqt-theme-engine but it is not going to be installed

                           Recommends: kio-apt-trinity but it is not going to be installed

                           Recommends: tde-guidance-powermanager-trinity but it is not going to be installed

                           Recommends: adept-trinity but it is not going to be installed

                           Recommends: akregator-trinity but it is not going to be installed

                           Recommends: amarok-trinity but it is not going to be installed

                           Recommends: bluez-utils but it is not going to be installed

                           Recommends: bogofilter but it is not going to be installed

                           Recommends: cdparanoia but it is not going to be installed

                           Recommends: cdrdao but it is not going to be installed

                           Recommends: cups-pdf but it is not going to be installed

                           Recommends: desktop-effects-tde-trinity but it is not going to be installed

                           Recommends: digikam-trinity but it is not going to be installed

                           Recommends: foo2zjs but it is not going to be installed

                           Recommends: foomatic-db-gutenprint but it is not going to be installed

                           Recommends: gwenview-trinity but it is not going to be installed

                           Recommends: hpijs-ppds but it is not going to be installed

                           Recommends: ijsgutenprint but it is not going to be installed

                           Recommends: k3b-trinity but it is not going to be installed

                           Recommends: kaddressbook-trinity but it is not going to be installed

                           Recommends: kaffeine-trinity but it is not going to be installed

                           Recommends: kamera-trinity but it is not going to be installed

                           Recommends: karm-trinity but it is not going to be installed

                           Recommends: katapult-trinity but it is not going to be installed

                           Recommends: kate-trinity but it is not going to be installed

                           Recommends: kbstate-trinity but it is not going to be installed

                           Recommends: tdepim-kio-plugins-trinity but it is not going to be installed

                           Recommends: tdepim-wizards-trinity but it is not going to be installed

                           Recommends: tdesudo-trinity but it is not going to be installed

                           Recommends: keep-trinity but it is not going to be installed

                           Recommends: kfind-trinity but it is not going to be installed

                           Recommends: kio-umountwrapper-trinity but it is not going to be installed

                           Recommends: kipi-plugins-trinity but it is not going to be installed

                           Recommends: klipper-trinity but it is not going to be installed

                           Recommends: kmag-trinity but it is not going to be installed

                           Recommends: kmail-trinity but it is not going to be installed

                           Recommends: kmailcvt-trinity but it is not going to be installed

                           Recommends: kmilo-trinity but it is not going to be installed

                           Recommends: kmousetool-trinity but it is not going to be installed

                           Recommends: kmplayer-konq-plugins-trinity but it is not going to be installed

                           Recommends: knotes-trinity but it is not going to be installed

                           Recommends: konqueror-trinity but it is not going to be installed

                           Recommends: konqueror-nsplugins-trinity but it is not going to be installed

                           Recommends: kontact-trinity but it is not going to be installed

                           Recommends: konversation-trinity but it is not going to be installed

                           Recommends: kooka-trinity but it is not going to be installed

                           Recommends: kopete-trinity but it is not going to be installed

                           Recommends: korganizer-trinity but it is not going to be installed

                           Recommends: kpf-trinity but it is not going to be installed

                           Recommends: kppp-trinity but it is not going to be installed

                           Recommends: krdc-trinity but it is not going to be installed

                           Recommends: krfb-trinity but it is not going to be installed

                           Recommends: kscreensaver-trinity but it is not going to be installed

                           Recommends: ksysguard-trinity but it is not going to be installed

                           Recommends: ktorrent-trinity but it is not going to be installed

                           Recommends: kubuntu-docs-trinity but it is not installable

                           Recommends: kubuntu-konqueror-shortcuts-trinity but it is not installable

                           Recommends: kvkbd-trinity but it is not going to be installed

                           Recommends: kwalletmanager-trinity but it is not going to be installed

                           Recommends: landscape-client but it is not going to be installed

                           Recommends: min12xxw but it is not going to be installed

                           Recommends: networkstatus-trinity but it is not installable

                           Recommends: openoffice.org-calc but it is not going to be installed

                           Recommends: openoffice.org-impress but it is not going to be installed

                           Recommends: openoffice.org-trinity but it is not installable

                           Recommends: openoffice.org-writer but it is not going to be installed

                           Recommends: pinentry-qt

                           Recommends: powernowd but it is not installable

                           Recommends: pxljr but it is not going to be installed

                           Recommends: rdesktop but it is not going to be installed

                           Recommends: scim-bridge-agent but it is not going to be installed

                           Recommends: scim-bridge-client-qt but it is not going to be installed

                           Recommends: scim-qtimm but it is not installable

                           Recommends: skim but it is not installable

                           Recommends: speedcrunch but it is not going to be installed

                           Recommends: splix but it is not going to be installed

                           Recommends: strigi-daemon but it is not going to be installed

                           Recommends: system-config-printer-tde-trinity but it is not installable

                           Recommends: ttf-arabeyes

                           Recommends: ttf-arphic-ukai

                           Recommends: ttf-arphic-uming

                           Recommends: ttf-kochi-gothic

                           Recommends: ttf-kochi-mincho

                           Recommends: ttf-lao but it is not going to be installed

                           Recommends: ttf-malayalam-fonts but it is not going to be installed

                           Recommends: ttf-thai-tlwg but it is not going to be installed

                           Recommends: ttf-unfonts-core but it is not going to be installed

                           Recommends: wvdial but it is not going to be installed

                           Recommends: plymouth-theme-kubuntu-logo-trinity but it is not installable

E: Unable to correct problems, you have held broken packages.

I don't get step 5 back on the PPA's overview page, look for the Signing key heading. You'll see something like:

1024R/72D340A3 (What is this?)

Copy the portion after the slash but not including the help link; e.g. just 72D340A3

Here is the link if you want to help me: https://quickbuild.pearsoncomputing.net/~trinity/+archive/trinity-nightly-builds/