Even if it is, you still won't be able to play the game at a playable frame rate using that card.  Uncompressed textures require a lot of vram on the card.  Basically because you have essentially no dedicated vram on that card (because its an integrated chipset) I don't think you could run the game that way.  The card you are using is also below the minimum system requirements for the game.  The game requires an x1600 ati card or an nvidia 6800 or higher card.  These cards score about 2500 in 3dmark06, your card scores around 600 on a good day, and because you are trying to emulate it in WINE, the game would run even slower then it would in a windows environment.  Even if you could get the game to actually start it wouldn't be playable.