Yamaha DTXpress/DTXplorer/DTXtreme

ok quick update

i have stumbled into being able to get the sounds, to play when i 
pencil them in, on the midi map, and i started using the drump mag 
download from here.

ok but how do i get it to record/register the sound when i hit the 
appropiate drum, cause so far i can only do it with stick tool, and 
manually input notes

does that make sense

anyhelp

also drum maps what are they, what diff do they make