Gunk you can always do previews you know. Just make a folder in your toribash folder/custom. Name it whatever you like.
Now for a second step. Save your head as head.tga(targa, you can find it in Gimp, just go to file/export and rename it head.tga.)
Ok, when you have done all that, put the head.tga file in your folder you have just created in the toribash/custom, go ingame and do /dl nameyouhavechosen. Then just do /lp 0 nameyouhavechosen and you are done.
Cheers!