I've managed to add my DoW, Soulstorm, DoW II, Chaos Rising, and Retribution keys to Steam. For some reason though, the Winter Assault and Dark Crusade keys aren't recognised. It isn't an insurmountable issue, but my copy of Winter Assault is part of a two game bundle, so installing Winter Assault means I also have to install DoW. My concern is whether or not adding the keys to Steam, and/or overwriting my DoW install will affect how the games interact. My preference would be to have them all available in Steam. Any ideas?