What's the problem?!

The problem is that I can't attach the helmet and shoulder pads using the existing Ghost model and by erasing its textures. I can make a helmet, but it will be without spikes (and I would like it to have spikes) - the spike texture is common to all helmets and shoulder pads! The same issue with the shoulder pads - the Ghost has ONE shoulder pad texture, and by erasing it, I will erase BOTH shoulder pads, when I only need one.
I have already extracted the Ghost model and adjusted it, leaving only the three necessary details, but here's another problem - my editor refuses to port these models.