Pyro, do you want edited screens? Borders, AH logo's, ect.... Or just a normal screenshot???
If it were me (and I might send in a few), I'd send just the screenshot. No fancy border, logo or lifted model pasted onto a non-AH2 background. Give them 100% content from in-game. Image adjustments with GIMP or Photoshop to make them look nice would be Ok, as long as it's not embellished with things that the game doesn't do.
They might have other uses for drastically embellished art, so feel free to go crazy.
