[Wine] Fallout new vegas lag help ?

Thu Mar 17 15:47:35 CDT 2011

I installed very thing ok I have a mac pro DESKTOP @ 2.66 ghz with 10 GB of ram and the minimum video card to run it the ATi X1900 XT which is running it on medium settings. it runs it amazingly but when I am out in the open or the sun is out it lags now if I look all the way down and up there is no lag ! I have even set everything on low and still I get that lag. But I turned it back on medium. Can some one give me a hand :D please and thank you and I am running on 10.6.3 maybe updating to 10.6.6 would help ? :D