Update, I found some of the original manuals - I have an abit IP35 Pro MB - as far as if it supports 45nm or not, I'm still working on that - their site and support forums are currently down.

To upgrade to vista 64 unfortnately will cost another $120 to re-buy the damn OEM version (as I have an OEM, not retail version of vista currently... and in that case if you want to change from 32 to 64 or visa versa it requires buying both sets seperately... thank you microsot).