While it seems fairly trivial to get PMD music to play in Hoot (since plenty of games use said driver), it's seemingly not as trivial with FMP and I haven't been able to determine if an existing game uses the driver.
The only clue I've had so far was using the following reference download from the Hoot website:
http://dmpsoft.s17.xrea.com/data/hoot_fmp.zip
Though I had to get FMP.COM and a few other files myself and add it in the respective zip file for the XML. So far, I've managed to only get its program startup music playing (??) but not the music file in question.
Here's what I have so far (trying to get the Grounseed shop demo tune to play):
https://dl.dropbox.com/u/1287967/malicex-gs_shop.xml (need to add this file on hoot.xml's list)
https://dl.dropbox.com/u/1287967/gs_shop.zip