Yamaha DTXpress/DTXplorer/DTXtreme

Hello all

Sorry if this was covered in another post - I've searched but haven't
found what I am looking for.

I have a DTXPRESS drum brain with the original DTXPRESS electronic
kit.  I want to take advantage of the internal sequencer to record a
loop for my band's live performance.  The problem is, til now I have
played the loop live with a Roland SPD-20 percussion pad, and I
haven't been able to find corresponding sounds in the DTXPRESS.  What
I would like to do is either:

A) Export the sounds I use on the Roland to a User Defined Kit in the
DTXPRESS (and then use the sequencer in the DTXPRESS brain to record); or

B) Use the DTXPRESS sequencer to record the sounds I generate on the
Roland.

I've looked thru both manuals and it seems to be possible, but I am
awfully new to MIDI save for hitting the pads.  If anyone can help or
point me in the right direction, I would REALLY appreciate it!

Thanks

S