repo

I still see lots of references to this particular part of my site on the internet.

I'm sorry, but I stopped creating Compiz packages several years ago because they, and 64 bit versions, became a part of default Ubuntu repositories. Besides, there are better ways of hosting Ubuntu packages like PPA's.
For further information I would like to point you to the compiz site
And besides Compiz being avaiable in the default repo's, come on guys, Gutsy Gibbon is ancient, heck, it isn't even supported anymore :>

So i suggest you go look at a way to upgrade to the most recent LTS or the newest release, see http://www.ubuntu.com

Greetings
Quattro