Manual File Fix for Archive & Install?


Apologies if this has been answered, but I'm lousy with search terms and couldn't come up with a thread for the precise answer I'm looking for.

I have recently upgraded a computer to Tiger and am now having issues with applications, namely our design apps (Illustrator, etc).

Is there anyway to take the files from the Previous System folder that the Archive created and put them in the proper places? I'm just trying to avoid a reinstall because I'd have to start at Illustrator 4 and Photoshop 3. I'm afraid all those classic installations could cause problems down the road, and it's already been done once on this harddrive.

So - to summarize - is there a way to move files to their proper locations without having to reinstall? If so, is there a comprehensive list of where these files are located in the old System folder?