Not bad at all... here's my result:
I did it on twice, on two separate layers, and set the top one to soft light; it looks slightly better. Also messed with levels and contrast to make it more intense. A great tutorial for beginners, took less than a minute to make.
Also, for screenshots, press PrtSc on the keyboard to copy the screen to the clipboard, where you can paste it into photoshop (or even paint for that matter) to save it. I think there was a way to capture specific palettes in photoshop, though that method escapes me at the moment...