It's very simple. You need to be a engy and someone who co-operates with you. Firstly, both of you go to your PT. Place ur remote-C4's on your friend's body, refill and place again. repeat this a very long time. then, both of you go togther somewhere. if you see the remote c4's on your friends body disappearing suddenly, dun fret. Its still there but its sort of become invisible thus making it easier for you to kill unsuspectible enemies. Go togther with your friend but do not stay close to your friend. when you see a nice time to detonate, detonate and see the nice effect. once, using this tactic, i asked my friend to go to the obelisk of light as we were all rushing them with APC, there were like 4 engys repairing the obelisk when i detonated the c4s, a terrible damage was done to the obelisk, it was like going to be destroyed in very few more shots. and those 4 guys got BOINKED. Well, whoever places the C4's gets the points so it is important to get someone who does not mind you getting the points. and to make things more fair, you be the kamikaze soldier and let your friend put c4's on you.

And one word of caution, when it is exploding, you may face the dreaded LAG