Yamaha DTXpress/DTXplorer/DTXtreme

Hello, 

   I am fairly new to this particular drumset and was curious if 
there was anyway to record the dtx with other drum sounds I have in 
different file formats. I know you can only play one sound with the 
different pads, but I was wondering if there was a way to make each 
pad a different sound. I have the drumset connected with the M-audio 
usb 1x1.  

   Thanks alot,
   Wade