I Used a Gp midi file for a session for a client today and used the TD-20 map.
The only problem I found was that I had to change the mapping of the toms.
If anyone needs the map I will be happy to upload it
SONAR X2 Producer
24GB Crucial Ballistix @ 1600mhz
NVIDIA GeForce GT 220
1 X OCZ Vertex 4 - OS + Sonar
1 X OCZ Vertex 4 - Samples
3 X W D C Black's,7200RPM, 64MB Cache.