I've put together all the tweaks and tips I could find to help you run the Battlefield 2 Multiplayer Demo as smoothly as possible into my brief Battlefield 2 Tweak Guide. This guide has 2 pages of the known tweaks for BF2, and should help overcome many of the difficulties people have been experiencing with this game - check it out. The complete BF2 Tweak Guide will be here shortly after the full version of Battlefield 2 is released in late June.