, and welcome to the forums.
I got a few questions to ask, but I am also off to bed - it's 1 AM and I have class at 8 AM and a 30 min drive....my apologies if I am not able to get back with you, but I am hoping that my questions will help someone else out in targeting your problem.
First of all, when you installed Vista x64, can you describe the customizations you made? Did you use the same exact username and password as before?
My theory is that if you didn't use the exact same name and such, the files are there, under your old username, and you simply cannot access them because Vista thinks you are not the same person....