Okay here they are...throw 'em all into a new folder in your WinAmp

Windows

@okay_here_they_are_throw

Just unzip to your winamp skins folder.

Windows

@just_unzip_to_your_winam

Spectrum Light

Linux

@doncsugar

Spectrum Dark

Linux

@doncsugar

Adwaita-Blue-Folders

Linux

@barnaba