I'm a bit leery of MPT. Last time I tried doing something like that (admittedly several years and probably several versions ago) it was a long, overly complicated process requiring tons of trial-and-error that usually produced bad results. But I'll check it out. Maybe it's improved since then.

EDIT: Just tried it, and it has gotten much better, but there are still a few issues. Try opening the MIDI file in the sample zip and you'll see. The piano gets turned into some sort of maraca, and a lot of notes that are supposed to be held get cut off very quickly instead.

Mason