ubisoft il2 forgotten battles running ok native drivers

IL2 FB running OK on Beta2 native drivers, just the aliasing was not like ATI's. In fact, I have backed from ATI Vista Beta drivers because it made visual things run not as smoothly as when under the native drivers.
Pentium D 930, Radeon X800, 2 GB SDRAM DDR2, Intel mobo 945GTP.
Edric