Playing MIDI drum tracks through Groove Agent SE

I have a few old rock songs that were recorded in Cubase SX. The drums are programmed via a MIDI track. I attempted to play these tracks through Groove Agent SE 5 and some sounds do not come out right. For example, the pedal hi-hat, which the GM Midi assigns to G#1 is played as a cymbal crash in many Groove Agent drum sets. From what I can understand, the issue is in the wrong drum map. The tracks are using GM MIDI drum map, but the GA drum sets use different mapping. What are my options in terms of fixing this? What if I want to try different drumsets in Groove Agent? Do I need to create a drum map for every one of them?

Bump. Anybody?