Here with texmod you can change the skin of halo such as your pistol colour or sniper colour.
Download-
http://www.fileplanet.com/205418/200000/...xmod-v0.9b
So you just click the folder icon when you open Texmod and when you are done locating your haloce you click the little folder in the middle then select a file such as this.
DOWNLOAD:
http://www.mediafire.com/?ogc0c6secnqhl3l
If help needed ask me on xfire.
Thanks
Sorry that I can't to screen shots I am still learning.
-BadBoi