This is a program that allows you to texture hack 3D models much more easily. It's Python, so until I make an EXE, you need Python installed. Oh, and the program is command line.

Usage:
python pytex1.py <inbdl> <tex1offs> <inbti> <btinum> <outbdl>

inbdl is the BDL you want to texture hack, tex1offs is the offset of TEX1 in inbdl, inbti is the BTI that has the edited texture, btinum is the index of the texture to replace (first texture is 0, second is 1, so on), and finally, outbdl is the file that get's written out once the texture hack is done.