Tef Realism is a mod for Battlefield:Vietnam. It attempts to improve balance between the two sides, and increase the realism of the game. Both clients and servers will need to download the mod.
Dnamro has released an installer version of his RealPlayer mod for BF42, so if you've been having trouble getting this mod set up then just download this file, unzip, double click the .exe and follow the steps, VOILA! He's also planning on releasing