Dang, I was hoping you wouldn't reply so fast
. I hadn't checked it out before I posted, and it turns out that some of the wiring was not correct in his box. Long story short, Windows XP is now installed on Hard Drive B (the blank one) and the computer is working.
I am now pretty sure that problem was with the video card driver since we are now back to everything from his original setup except for a different hard drive- and it's working just fine.
So is there any way to restore his "old" driver? Hard Drive A is the secondary so we can read data from it just fine and copy it to Hard Drive B. Tried System Restore, but it couldn't see the Restore points that were on Hard Drive A. (I guess this is no longer a hardware issue)