Great screenshot, maybe if you just used the 2 guys as a render, and put something else behind it, and then used some different effects.
I didn't want to change that picture that much, it's my best screenshot and I didn't want to overdo it.
Well I see you did do some effects (sky and satellite). I didn't notice you were so protective about your picture... Lol jk. Just saying what I thought would improve it.
Photoshop CS2? If so, and its all in one layer, go to one of the things at bottom of layers box, click uh... *opens photoshop* K. Click the F thing, then click stroke. Make it "inside" and set the size to nothing bigger than 5, and make color probably black. You can also mess around a bit to make it different, like i did with my 3rd in gallery.