Primary function is like winamp 3's alt clicking, you add a song to be played next (overrides shuffle).There is a repeat selection button that repeats the selection of songs forever (or until you press the button again).The plugin also has a 'blank entry', i.e. it lets winamp select the song. You could make a selectionof songs with some blank entries, lets say a song, a blank entry and another song and hit repeat. Theplugin would then play the first song, then a random song that winamp chose, then the third one andthe process would then start over (first, random, second, first, ...)The plugin also has some hotkeys for some basic winamp buttons.Read the readme file for the whole list of functions.
This is a fairly full featured application that includes toolbar control for Winamp as well as hotkey configuration, bookmarks, and a sleeptimer. Very extensive and clear manual/readme html file is provided...definitely check it out to make sure you are getting the most out of the application.