I've asked Apple if this direct x X card [nVidia 8800GTX] could substitute the cards that they offer on the Mac Pro, which I need to buy for CS3/Lightroom usage. They didn't say no exactly but they didn't say yes either-just that it [understandably] wouldn't be supported. I've really looked around and haven't been able to get any input. The problem I'm trying to solve is combining a business app [CS3] with a personal addiction MSFSX.