So recently my computer's hard drive broke and I had to get it replaced. The computer guy offered to move it down to XP from Vista since it's faster, and I said sure, why not. Then recently I thought, hey, the reason PS wouldn't work on my computer before was that the drivers didn't go forward enough and there weren't any Vista Omega Drivers. So I wondered if there were some for XP. And there were. So now PS is working on my computer and I can play again.
Awesome.
Now I need to work out what's changed since I was here last...