okay.... unfortunately it doesnt work the way i thought....
cause only the texture is defined in the .skin file
But you actually should be able to change the heads (just not without copying model files) as the heads don't have any animations (as far as i know they normaly dont have any)..... the only thing that yould be a problem is that the head doesnt fit perfect....
As wanted in the other thread here is an explanation on how you (hopefully) can add additional textures)
but you can create a new texture without having to copy the models or something like that.
just open the sg_pak0.pk3 file and go to /models/wq3_players and open the folder of the character you edited.
you will find some .skin files in there.
choose one of each .skin files with the prefixes head_, upper_ and lower_
you skins probably have similar names....
you have to copy the .skin files in your own .pk3 (hope you know how to create that one...)
and now you have to rename the .skin files. the prefix has to stay but choose an other name like head_meine.skin. you have to do the same thing with your textures as you dont want to replace the original ones.
After you done that open each.skin file and change the names of the textures in there.
but the name of the texture actually doesnt matter... just has to be the same in the .skin file
now you have to copy your .pk3 in to the other .pk3 files
hopefully the skin works now
I'm not sure if this really works as i don't have any textures to test it with...
also i hope that this isnt confusing....