I played this with 1 gb memory,an MSI dedicated card,80 gb hard drive and and very angry celeron 3.2 processor that feels like a whipped pony trying to race on Churchill Downs with the big guys.It ran a great race and I'm proud of it.I had Vista installed and had no problem.You really need a good system to play this game. I tried to play it with integrated ATI EXPRESS 200 and could n't load up. I would always crash and get a windows graphics error message. The problem was I didn't have shader3.0 .The msi took care of that and also helped vista aero graphics.The game itself is pretty good. For the price I paid for it it's a good buy and I would play it again.The game takes up 10 gb of hard drive space. I played it on an 80 gb hard drive with no problem but I would advise using a larger hard drive.It's a good game but demands a great computer.Don't knock Celerons as junk. It did the job although a Pentium would have been better.