Despite Winamp being the media player of choice in the early days of the internet, very few Winamp skins where actually made featuring Nightmare/Atmosfear. The two featured below where created by Jason Skaggs for The Other Side, his own fansite prior to joining the Well of Fears Team as marr0w.
You shouldn't even be seeing this. Bizzeebeever told me to add this here so that we can get responsiveness working for all screens.