Scenario #1: Manually removing launchers

I installed a few games from the recent Humble Indie Bundle and removed them today.

The games which were installed using a deb were successfully uninstalled and removed from the dash, however, the games that I installed using the .run format are still in my menu and dash even after uninstalling them... how do I remove those items?

Scenario #2: Adding custom launchers

I have created Wine shortcuts to card games on my Windows partition. I added these launchers in alacarte (Menu Editor) and they worked fine in Classic Gnome, however they are not appearing in the Games section of the Unity dash. Is it possible to add launchers for these games to the dash, or do I have to add the launchers to the desktop?