Controlling Redrum from Sonar

Only a sort-of Sonar question, but everyone here seems very helpful, so I'll ask anyway.

Have been using Redrum in Reason as a sound module triggered by MIDI data in Sonar. This is all working fine, but Redrum uses it's own, non-general MIDI key mapping for this, which is annoying. Means I can't use Session Drummer to trigger Redrum without a lot of messing about, stuff like that.

Does anyone know of anyway to either force Redrum to use GM mapping, or make Sonar "translate" it's mappings on the way out?