All skins should be extracted to your "skins" directory in the Mumble root directory.
Example: C:\Program Files\Mumble\skins
IMPORTANT: For best results, use the "WindowsXP" or "WindowsVista" style with this skin.
Juicer
Launch Juicer (Requires: Mozilla Firefox, Opera, or Internet Explorer 8)
Version: 1.0 beta
With Juicer, you pick the colors you want for the Mumble skin and download it. It's very simple and easy! I can add additional skins and schemes to Juicer, so please let me know of any you would like to see put in Juicer. I started development on Juicer about a year ago, I'm very happy I have finished the first version.
(Screenshots coming soon!)
Orange Juice
Use Juicer!
Minimili
The the primary purpose of this skin is to be as compact as possible. (I'm not sure if I will ever finish it.)
Other Skins
You can find skins made by other people here: http://mumble.sourceforge.net/Skins