I took a look at the L6 .mod file in Max:
The problem lies in the mod file, it is SFC1 not SFC3, it refers to .pcx textures instead of .bmp textures, there are also illumination maps missing. I have tried to convert but 3DSMax 5 keeps crashing, perhaps someone else could have a look?
I also had to take the .mod file out of its folder with the textures to look at it, as in that folder it crashed Max.