I have found why this doesn't work. ME uses a redistributed version of Winamp, running 'hidden' and remote controlled. This is fine, except that the version of WinAmp is 2.8, and ancient version. I tried copying a later revision that has the Nullsoft Stream Video codec; unfortunately ME wouldn't start with any version other than 2.8
Any of the author(s) here than can shed light on why 2.8 is necessary? I can try a version 5 Winamp with its Version resource hacked to appear like 2.8, but maybe there are other reasons?
Any of the author(s) lurking here?