Yamaha DTXpress/DTXplorer/DTXtreme

Hi.  I just got my DTXpress last weekend for my birthday.  I am new with
MIDI and I am trying to learn some about it.  The first thing I am trying
to do it access all of those MIDI voices that come with the DTXpress.  I
am not sure how it works, but can you use some of those MIDI sounds when
you create your own drum kits and save them.  That is, can I create a drum
kit that has some bag pipes or a banjo or a tuba or something?  Mainly, I
just want to hear what all of those voices sound like.  I plan on doing
some recording in a couple of months and I would like to incorporate some
MIDI sounds with my recordings.  Any help would be great.  Thanks in
advance,


Vishal