Hi 642carl,
Having loaded an internal Cubasis drum kit, the edit function within the pads’ section allows to re-assign the available drum instruments of the kit.
Available MIDI notes are fixed values coming with the loaded drum kits.
Cubasis’ MiniSampler comes with lots of great sounding factory drum kits, plus allows to create own instruments including free mappings.
Please check if this option helps to solve your issue with the Alesis DM6.
Best,
Lars