I've got Winamp v2.91
(
http://www.winamp.com)
running BlueCurve skin
(
http://classic.winamp.com/skins)
and the tranparency is provided by TranparentFX v.1.7, however it only works on Windows XP/2000
(
http://www.draconpern.com/TransparentFX)
and last but not least DFX for sound enhancement
(
http://www.fxsound.com)
I have found that using the "laptop speakers/headphones" preset for the equalizer provides really crisp audio. If you have any other questions, let me know.