If youd rather have a jazz format than run mp3's through plus, convert it to a .wav using something like audacity, then make it a sample in OpenMPT, and play the song file followed by several blank charts (default settings works out to exactly 7 seconds i believe) This is good for making them, only they are usually much larger and cause memory overflows in non plus or non memory patched versions. Either way its kinda inconvienieced a bit

I though he had mentioned somewhere that he was doing that so that in later versions it could autoupdate itself, i'l see if i can find that post