If I am to model something - say wings - for V4 and I want it to have more bones and more groups than what V4 has yet still conform, what would I do?  Are there any rules?

Obviously the prop/figure would have to have a chest group/bone, which would conform to V4, but then can I add feather84 bone and group?  Does this effect conforming in anyway , is there anything I need to know about it?  Any tutorials on this topic?

I am:  aka Velocity3d