Yamaha DTXpress/DTXplorer/DTXtreme

Just got my DTX2 kit and I bought a extra TP80s pad and from what I 
understand this is a stereo pad which means I can assign 2 voices to 
it. Am I correct when I say I can assign two voices(one for the rim 
and one for the pad) and if so how do I go about it. Manual is a 
little confusing. Im assigning it to input 9/10 and this is a stereo 
input so this would be correct for a stereo pad, yes? Also the volume 
on the DTX2 is low too when listening through headphones so use a low 
impedance set of about 40 ohms or lower. I bought a decent pair for 
about $25. Also when I change a pad voice or edit it, can I change 
that particular pad for all the kits at once or do I have to do each 
kit separetly. Any help will be greatly appreciated. Once I get the 
hang of this thing I would love to share the kits and tunes I make 
but I'll probably need some help with that too :-)
                      Saboricua 81