Nesrally:

I'm assuming you have BIAB 2014 and that you purchased it on a hard disk drive.

As far as I can tell, there are a couple of ways to "jukebox" a set of MIDI files.

1. The easiest way is to use the free copy of RealBand that came with Band In A Box. RealBand has a "Jukebox" the same as BIAB, but it will play all your MIDI files.

2. If for some reason you need to use BIAB, then you will need to open each MIDI file in BIAB using File > Open MIDI File and then use Save Song As and save it as a BIAB file. It will save with a .?GX extension which you can then "juke" in BIAB.

Let us know if you need more help.

Good luck!
LLOYD S