The skin has a several piece deisgn, so individual pieces of the skin are molded to fit different components on the phone, so it isn't covering any places where heat would escape.
This Winamp skin was made by Carl Warwick (c)1999 (http://www.ParkstoneMOT.freeserve.co.uk)
Distribute this skin freely to anyone, but don't mess around with any of the files please.
There are loads more skins on their way, they will include everyt ...