Homer J:
In general (as in General MIDI), nothing should change. MIDI data is MIDI data, so the JV-2080 will accept your drum parts the same as your old system did - as long as you stick with the default GM patch, which is supposed to be universal.
However, any time you change sound modules, you'll want to utilize its advantages. The other available drum patches probably won't have the same drum sound/note associations, so you'll have two choices - re-write the drum parts to reflect the change, or construct a new drum set on the JV-2080 with the sounds you want associated with the notes your software uses for each drum sound. Recently I did the former, and it's a pain - I think I'll probably do the latter when I obtain a new drum module next month.
Hope this is helpful . . .
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"The problem with the world is that the ignorant are cock-sure, whereas the intelligent are full of doubt." - Bertrand Russell