ok, hers a tut
1. go into hmt and open up any map
2. go into bitmaps and find the ghost
3. look for the button under the pic that is labeled "inject texture"
4. click it and look for your skin then click open (click yes on anything that may pop up)
5. once you see your skin in the picture box, click save and your done!
oh, wait is this for halo pc, halo, or halo 2??