I still think I did a pretty good job considering I don’t have a cool program like that. But still, it would be a lot better with one. I think I will download it and try to fix those damage textures.
I think you did a pretty DAMN good job considering you don't have a cool program like that, but if you can do that with Paint, just think what you could do with Photoshop, Paint Shop Pro, or GIMP. With Paint, you're moving with thrusters only, but with one of these other programs, you're flying a warp speed!
I would recommend trying out GIMP simply because it's free. I've used it some and, aside from a few little annoying quirks, it works pretty well. Anyone who is familiar with Photoshop should be able to pick it up easily. Personally, I use Photoshop CS, but I got a great deal on it through my school, and I doubt that I would have paid full price for it if that was the only way I could have it.