Uninstall information uninstalled

I decided to uninstall Jedi Academy today, and found that most of my installed programs are not showing on the add/remove program list. Any idea why that would happen? Is there anyway to correctly repopulate it?

Let me take this opportunity to bitch about the whole idea of the registry. I can understand the reasoning behind it for certain shared/OS functions. I hate how most programs piss all over it just to mark its territory. I hate how most programs leave little “gifts” even after I uninstall them.