UT GOTY edition? That's still plain old UMX-music, nah? So just use a player that can play that format, such as XMPlay (http://www.un4seen.com/), or use a Winamp-plugin, such as http://www.winamp.com/plugins/details.php?id=49627, if you really need to use Winamp. :P
As for selecting a song in...