Here, I don't care about the rules anymore. All rep and credits go to Goolygot, I just added a black background and borders. If you wanna follow the rules, then don't use them.
@Morbid: Dude, of course the mapper will add credits! I mean, the whole point of a screenshot icon is to suit a custom model, so, unless he uses the icon and not the model, which is quite stupid, then he will at least assume to add credits. I value people's resources, just not AS much as when doing something so minor as taking a picture of a model for a game.