The Winamp 2.x Skinning Tutorial by SacRat and Imagine goes beyond just explaining the technical formats of Winamp skins, it covers all processes of creating a Winamp skin from developing an idea to publishing it on the Internet. This all-embracing tutorial consists of 14 pages in PDF format.
"Skinning Winamp 2.x: Information & Tatics" by Andrew Mackowski is a short online tutorial that covers all aspects from planning a skin to publishing it. As the title says, this tutorial focuses more on tactics and less on specs.
This Tips & Ticks tutorial by ¤db¤ is for intermediate to advanced skinners who who already know how to skin for Winamp 2, culled from the knowledge of dozens of Winamp 2 skinners. Even hardened skinners are very likely to learn a few new tricks from the relatively unknown to the downright obscure.