Plastyk by StillWater
As with most Classic skins, this looks better with "skinned font" and "skinned cursors" turned ON in the winamp options. And if you use windowblinds, make sure you put winamp.exe in the Windowblinds exclusion list.
More of my skins here:
Many thanks to the people that gave me feedback on this skin. And thanks to God for getting me through this one with relatively little frustration! :D
I hope you enjoy the skin :)