Yamaha DTXpress/DTXplorer/DTXtreme

Hi guys.  I recently got a DTXIIISP and I'm loving it.  I stumbled 
upon this group while looking for some better instructions for the 
kit (the Yamaha manual really blows) and I'm glad I did since I've 
been able to get answers for just about every question I've had.

I got bit by the upgrade bug.  Just couldn't stand having an empty 
input in the back of the machine.  I got a TP120SD to replace my 
TP65s as the snare (wanted a bigger snare and to get rid of that bar 
over my knee).  I wanted to use my TP65s as a 4th Tom and use the 3-
zone capabilities to add some percussion sounds.  To do this I would 
have to swap about 3 pads around from their inputs.  

So my question is: Is there a way to swap inputs assignments or do I 
have to individually assign new voices for each pad for every single 
kit?

I've searched the archives and the manual but haven't been able to 
find and answer.

Thanks and sorry for the winded message.  Next one will be short, I 
promise.