the stuff we're doing in TR so far (all for the demo) is all for 1918, so none of the skins have pickelhaubes
i think the demo has got 1 trench map, the others are set in towns, but beta 1 will have more trench maps
all the player skins are done (not final tho), all with custom gear and helmets, the screenshots are here:
http://www.warwickmedia.com/trenchrats/modshotsp3.shtml