THANK YOU SO MUCH for those great instructions for getting Milkdrop 2 to work with Mediamonkey!!!
Unfortunately, apparently Nullsoft has found a way to remove much web access to the older winamp version you mentioned...
Fortunately, however, since I always keep my old downloaded preinstall files, (and I've been a winamp user for years), I had version 5.5.0 in my archive and I just uninstalled my more recent winamp and reinstalled the older version, and following your instructions I had no problems at all getting Milkdrop 2 into MediaMonkey!!!
(I did not have to edit the Mediamonkey.ini file, btw) and both versions of Milkdrop are in my visualizations list.
yippee! I'm off to play some music!