Bioshock technical issue

So I bought Bioshock like a lot of other people and I am having a pretty lame problem right now. Well right as I bought the game and ran it I noticed my guy was black and so were the enemies and I googled around for a bit and found out that ATI had released a fix which was 100 mb and I downloaded it and it works perfectly except....... for every 20 minutes into the game it freezes. I control alt delete like normal and go to end task and then I blue screen right as i hit end task and end now...... I was wondering if anyone knew how to fix this problem. System Specs: 2x2900 xt, intel badaxe2, q6600@3ghz, 2x1g pny ddr2 1066, sound blaster xfi elite pro, microsoft windows vista ultimate 64 bit, raptor 150 gb, dell 3007wfp. Every other game runs perfectly btw,

I'm running SLI on Vista 64bit and got 2 of those bluescreens - doing some memory crash dump error

Only get it when playing this game and I think I'll stop playing it until they fix their crap