Off the top of my head, if you delete the TEXTURED field from the FPE file and then delete the BIN file, the model should load, and not apply ANY texture to it, thus leaving it to use whatever textures it had initially. If you place all your textures alongside the model, it should be fully textured as described in your original modelling package. Might be wrong, but this is exactly how gun models are handled as many of the guns are multiple textures (one for the gun itself and one of the movable ammo clip).
"We are the knights who say...eki eki eki fatang loopzoing, zanziga....ni"