If I export the session right off the bat without any preparation, I'll end up with one single channel, with all of the instruments blended in (all instruments being mixed together in one single channel). So you would have to sort them out by ear (and perhaps fill some gaps left by different instruments that played the same note). But if you have both the musical skills (to re-arrange and sort things out) and technical skills (to remap according to your own retro gear), that's totally doable. Would you need the midi for all the tracks in the music pack?