Desert Combat is a modern take on on the Battlefield 1942 story line, with a marine vs insurgent type combat.  DC has the same kind of vehicle setup as BF, in the respects of being able to drive every vehicle you see, with new vehicle types (jets and tanks) as well as some all new types of vehicles (helicopters).

Once you have Battlefield 1942 installed and set up you can download and install below...

1.  Desert Combat 0.7
2.  Desert Combat Final

Note - A common issue we've run into with this game is having it crash while loading into multiplayer maps, make sure that you go in and save your video and sound settings.  While this doesn't work for every case on every map, it helps with the majority of the games and game mods.