I found a small tutorial on how to play Command and conquer multiplayers.It’s really fun and you all should try it at leas once:)
Here’s what the guys at howto.com think you should do it, and i kind of agree with them:
Battle against your opponent when playing multiplayer in Command and Conquer 3.
Attempt to be the first to build up your economy and forces when playing.
Study your opponent’s actions as you try to decide how to proceed when playing Command and Conquer 3. You can choose to attack quickly, thus throwing your opponent off his stride, or you could establish defenses while sending out as many “high-value” forces as you can.
Choose between different multiplayer modes when playing multiplayer Command and Conquer 3. You can play “Capture and Hold”, “Siege”, “King of the Hill” and “Capture the Flag.”
Look at all the different maps that are available for the multiplayer modes of Command and Conquer 3. You will be able to play the multiplayer modes in a wide variety of locations.
Play with up to 4 players when doing multiplayer Command and Conquer 3. Use the “Vision Camera” to spy on what the other players are doing, and chat with your teammates with “Live Whispering.” You can also combine your army with one of your friends and plan to attack the forces of the others with whom you are playing in Command and Conquer 3 multiplayer.
Pick different factions to join when playing multiplayer Command and Conquer 3. In the expansion, you will be able to choose from 9 subfactions. It is now possible to mix and match these various subfactions.
If you need anymore assistance please leave a comment and I’ll send an e mail, or write a post on how to solve your problem, or you can check howto.com website.