Paint is fine for screenshots. Just take a few in game, at least then people can get a proper view. I for one don't like being too critical of screenshots from far out, closer in you see what the player actually sees, which is ultimately whats important. Just press print screen button in pull screenmode then paste straight into paint. If you take it as a large screenshot, you need to set it to show all layers in rmxp.
@durdadan - That screen doesnt worl for me with that panorama, the perspective needs to be higher in the panorama and it's too real in comparison to the tileset. Bopth together means it doesnt quite work. The twon in the background doesnt seem to have the same architectural style as the tileset, maybe New York panorama would work better, somewhere with many skyscrapers.