For Fedora use:
yum install http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-18.noarch.rpm
768 yum install http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-18.noarch.rpm
yum install lame
yum install mp3gain
yum install audacious audacious-plugins-freeworld-mp3
to change skins:
left click -> view -> classic winamp