sorry , here are some instuctions some one sent me
To create mmf files use PSMPLAY . 1. Select file then open your
midi file. 2. Goto file, create SMAF, & SMAF 16chords (EZWeb). 3. Type in title & set your max size dependent on which user bank it is to go in, either 8Kb or 16Kb, then click OK. 4. Click File & Select Open created, which opens up the mmf file you have just created & if it sounds OK then upload.