Yamaha DTXpress/DTXplorer/DTXtreme

1. how do i change the sound assigned to the metronome? i want it to 
be handclaps because handclaps are cool.

2. the handclaps in the dtxpress II suck ass. there are like 2 of 
them. is there any way i can download or record better handclaps on 
my computer and get them stored as a sound in the dtxpress brain? is 
that possible? do i need to buy stuff to do this?

3. if i'm making my own kit, and assign one of those pre-recorded 
drum grooves to a pad, what do i do so that when i hit the pad once 
it starts the drum groove, and when i hit it a second time it turns 
off? i can't figure out how to do this. when i hit the pad a second 
time right now it just plays the drum groove again over the oringinal 
one playing and it sounds awful.

thanks!