Yamaha DTXpress/DTXplorer/DTXtreme

Hello I am new to the MIDI scene and I am very lost on how to use my
eDrums with Homestudio. I can get as far as recording a track but
obviously the sounds coming out of my soundcard don't match the kit. I
was wondering is there a way to download the sounds from the kit to
the computer for play back? Also, when I record do I assign each pad
to a seperate channel or do I play it as if it were a "keyboard"? I am
so confused and whenever I try selecting a different patch or bank
there is no change in sound playback.

Thank you,
Eduardo