For what it is worth, I appear to have gotten very lucky in this regard.
The search for 64bit drivers was not nearly as hard as I thought it would be. Lets see now,
Epson 1660 Photo Scanner-no problem
AL1706 LCD Monitor-no problem
HP w2207H LCD monitor-no problem
HP a6300f computer including motherboard, all chipset drivers, sound, lan, keyboard, and mouse-no problem.
Logitech Webcam-no problem
APC Uninteruptable Power Supply-no problem
ATI HD2400 Video Card-no problem
So I guess thats it and I should be ready to go.
Point of interest to me will be to see if the Crucial 2gb ram dimms can be overclocked more than the previous ram I have been using.
Also of interest to me will be whether or I can just upgrade from 32bit Vista to 64bit Vista or do I have to do a reformat.
Installing of software I don't gather is a big deal as the stuff that really counts like Microsoft Office is 64bit also.