The Chops Builders MIDI files are located on this NAUTILUS disc in the 
directory SBYTES\CHOPS Instrumentation is as follows:

Track 1 - Bass (or Electric Bass as you like)
Track 2 - Piano (Keyboard)
Track 3 - Drums_as follows

C1 - Kick
B1 - Sidestick Snare
F2 - Hi Crash
E1 - Snare
C2 - Low Tom
F#2 - Cabasa
F#1 - H/Hat Cl
C#2 - MedLow Tom
G1 - H/Hat Med
D2 - MedHi Tom
G#1 - H/Hat Op
D#2 - Hi Tom
A1 - Low Crash
E2 - Ride Cym