If you get the vgmstream plugin (works with winamp 2.76-- can get at oldversion.com)
(vgmstream-r973-test.zip (extract C:\Program Files\Winamp\Plugins) and vgmstream_external_dlls.zip (extract dlls to C:\Windows\system32) ) to work..
(BETTER YET !
http://out-lame.sourceforge.net/
I found a plugin (out-lame -- be sure to configure output directory and lame_enc dll in the settings) for Winamp 2.x? that will allow for you to convert the files to mp3 files, automatically naming them thus:
from 01-boss-luminar.ss2 to 01-boss-luminar.ss2.mp3, etc. If you get an batch file renamer, you can remove the .ss2, etc from all the files.
Cheers as some do say! Have a wonderful day!