Excellent Game and although Different from Dark Omen, still quality.
I have the Vietnam Mod Green Berets that came with a free copy of Myth 2 from the Shops!
http://reviews.cnet.com/pc-games/green-berets-pc/4505-9696_7-30989324.html
I think it came with the Map Editor Tool kit as well but I will have to check.
I know Mikademus has great plans to include this in WARTBED and can
probably post u some links to their Community, as they have their Source Code.