I've accidentially overwritten my bootloader. I was prepping some live USB sticks and think I accidentially wrote to my local disk instead of my USB stick. Now my machine will only boot in to Fedora and only in a live boot environment.

I've downloaded http://www.supergrubdisk.org/ and installed that to a USB stick and am looking at that, but have never used it before and don't even know if this will work.

Can anyone help me get my bootloader back?