there is nothing better than a human eye for doing the registry... all of those "magic" utilities just have a set number of registry things that it looks for and if they are there it deletes them..
If you are good with registry your best bet would be to just look thru it and learn about it, and then start deleting stuff. If you do not have a lot of that experience i would suggest you stay out of there. its a catch 22 ... you can fix it but you can also break it really good
-E