Yamaha DTXpress/DTXplorer/DTXtreme

Hello,

Trying to load / save user kits from a DTXpress to a laptop. I am
using WinXP, MIDI-OX, and 1-1 MIDIsport USB-MIDI adapter.

I seem to be able to get a MIDI dump from the DTXpress, but I can not
figure out how to send a .syx file user kit to the DTXpress.

Any help is much appreciated. This (MIDI and electronic drums) is all
new to me - I'm the guitarist trying to help the drummer -- so don't
fear being too simple for me!