Unpack the RSP.DLL from the plugin into your winamp directory and the in_usf.dll into your winamp/plugins directory.
Then unpack ge.rar and open one of the music files (xx.miniusf) from within winamp.
Problems, read <a href="http://www.dextrose.com/_forum/showthread.php?threadid=10163">this thread</a> - the plugin does seem rather flakey.
P.s. your google-fu is weak
