Hi, I know you!
Might seem strange I'm responding to this, but, I doubt it can be done. However, if the file has several face textures, I have found a way to only use 1 texture, but I think it only works in certain situations and it would be hard to describe now anyway. You could always let me help with the problem- just send the textures and state exactly what you want to do.
*Anyone else can send their suggestions too!!!
A very bored modder with LOTS of time:
http://members.aol.com:/R22cool34/bored2.html (Maybe one or more can be added to the forum smilies