Yea, I thought I was going to be the first to reply, but when I did I got beaten to it. Twice.
Its pretty hard to say what files/folders are required for each app, without knowing what apps they are.
Kari also sums it up pretty well.
It really is more hassle than its worth.
I've been there... still there with one of my machines actually... Cant get my Fruityloops back
Its best to reinstall the apps, and salvage whatever userdata files you have for them.