PG can sell their Midi Super Tracks as 3rd Party Toontrack Paks.
POP_PIANO_BALLADS_VOL1.zip
extract to wherever the Midi library is
C:\Program Files (x86)\Common Files\Toontrack\EZkeys\Midi
C:\Program Files\Common Files\Toontrack\EZkeys\Midi

these will show the directory structure and naming if you want to create some from the Midi Super Tracks and sell to Toontrack users.

You should be able to do the same with your Bass SMT's
C:\Program Files\Common Files\Toontrack\EZbass\MIDI
I just had a look they also have a chordinfo file with the midi:
Variation_01.mid
Variation_01.midchordinfo

Code:
ChordList {
Chord {
Note 1 1 1
Time 0 4
IsSelected 1
ChordParts 6 
}
Chord {
Note 1 1 1
Time 4 6
IsSelected 1
ChordParts 6 
}
Chord {
Note 8 8 1
Time 6 7
IsSelected 1
ChordParts 6 
}
....