This is a very cool project. I can write a little post about it on our RolemasterBlog if you want a little more publicity; it might entice more contributions.
I have thought about how to convert Warforged to Rolemaster, because I think the race is very cool (and loved playing one in Dungeons&DragonsOnline). The stats are easy enough to convert, but the healing is hard to figure out. In 3.5, iirc, they only got half the effect of healing spells, since they were essentially living constructs. But they could also be healed fully by repair spells. I've been trying to figure out a way to implement this in RMU. I actually looked through the Rolemaster Spell Law (RMU) but didn't really see anything that worked quite like a repair spell; the Lay Healer's Repair on his Prosthetics list was about the closest I could find, but that's level 16. There is also Mend Mechanism, Adept Base, in Treasure Law, though it would have to be adapted somewhat.