No, I did not make any of these skins. I'm not that talented graphically. You will need to have some sort of unzipping program to open these files, such as WinZip (http://www.winzip.com/).
To use, open the file, and unzip/extract to your WinAmp's skins directory, which is usually C:\program files\winamp\skins\. You DO NOT have to create a new folder to put the skins in, WinZip will do that for you. ^.^
Yeah, I know I was listening to The Smashing Pumpkins when I took the screenshots. They're my favorite group, alright? And Siamese Dream rocks you! ;P
If you'd like to to this small Heero WinAmp skin collection, let me know!