Problem with custom character

I tried making a new character for K1 using these two tutorials. I edited the texture for both the body and the head.

I have a problem with the mdl file. If I edit it like in the first tutorial, the game crashes at the character selection screen, and if I only rename it, the default head texture shows up instead of the custom one (resulting in a Twi'lek with head and body differently colored:rolleyes:).

Does anyone know how to fix this? I'm sure it's a very stupid question but I can't find any answers...