not really, but I find that some time the game crash when I launch windowed, have you tried to launch it fullscreen?
is the driver really installed (with the omega sign in the tray), have you launched other games since his install to test it? Before installing it, be sure you desinstall your previous ATI one, and reboot. Then after booting, your system should tell you there is a VGA adapter only. After that, you install the omega driver.
see also the command lines options, like forcing a resolution setting, or adding -xxx for low quality/best performance
otherwise, toshiba, hewlet and compaq have drivers for the mobility, you can try these ones. I'm stil surprised that omega driver didnt work, it was painless for me. The guy behind the website seems to knows a bunch, perhaps even more than some of ATI crews
