it should be noted that most SPC and NSF midi rips are not always clean. Normally those are avoided due to the user unable to clean them up to a serviceable manner. This is where a seasoned sequencer and someone with a good ear is needed since you have to write in the missing or messed up parts.
When I made Vortex, I used both my own memory and some of a SPC rip. It was pretty messed up and it wasnt possible to do a direct set up.
Break down of Vortex