2 armatures

[Albin]

Im wotking on a new rocket luancher and it got some sentry parts that i wanted to use the sentryanimation on so i took the armature from it, since theres no way of edeting valves amature and just add rename the movend bone & copyd another bone from the rocket luancher (in the gcf file) but since i got 2 armatures none of them get included in the .smd and the mdl compiler says "cant find rl_body" even tought i got it, Is there anyway to merge the 2 armatures together? or perhaps edit the sentry bones and keep one extra and just rename it and move it in place?