How do I go about uploading an image onto the face of my winamp skin?

check these links

http://www.winamp.com/nsdn/winamp2x/dev/skins/
http://wsdskins.cjb.net


and here are some skinning tools if u only want pics on winamp for personal preference then u can use some skinner programs but not if u want to submit skins
http://www.1001winampskins.com/winamp_skin_tools.html

First up, you bookend your sentance with "please" and "thank you" :) second of all you click this LINK and learn all there is to learn :)

Back to the day job :)