model importing help

[Seki Ryuu]

im having troubles changing one model, to another, like: the banshee into a fighter bomber...or swordfish...w/e its called, and it either says that there r more vertices or indices than the original, and if i get past that, it says that there r too many attachment points or something....im completely lost

[[]

Yeah, I'm pretty sure you can't import models that have more or less vertices and indeces (or whatever) than the original model.