If you just bought Battlefield 1942 -- or even if you've had it for a while -- and are looking to get it running at its best on your system, check out the guide that TweakTown wrote below:
http://www.tweaktown.com/guides/420/battlefield_1942_tweak_guide/index.html
http://www.tweaktown.com/guides/420/battlefield_1942_tweak_guide/index.html