No normal PC would be able to fully support the game.
Since the PC's main purpose is to be a PC, most of it's energy is focus towards that instead of the game itself, that's why it take alot of time to start unlike consoles and electronics.
You would need something of a Quard Core for XP.
Because you'll need that extra energy.
Plus, according to PC specialist, Vista is terrible to play games with.
It had a hard time to play Guitar Hero 3! (There a PS2 version...)
And this was in one of the easiest songs too, dual core.
Well, it still wasn't my XP PC.