Thanks very much for the files. I'm having the same issue, though. Must be imperfect emulation. It's actually really distracting to me (especially in LeChuck's Revenge) so I'll stick with Adlib for now.
The hex editing bit is from this ancient thread I found when looking for the M-32 ROMs: http://vogons.zetafleet.com/viewtopic.php?t=7270

