First of all; I am not english, so sorry for the possible errors in the writing.
Well, to understand my doubt you must watch the next video:
As you can see, that is a clip of Battlefield 3. We are making a movie but... some soldiers have a blue icons above their heads. So, I am trying to remove those icons... but I can't. I searched all kinds of videos on Youtube but no one is certainly good.
This is all... I need help with it, I don't know if this is easy to do but I am begineer with this programs (I have AE CS4)