Yamaha DTXpress/DTXplorer/DTXtreme

Hi.  I am looking to buy a DTXpress unit but I need an expansion card 
to burn my own sounds/samples.  Does this module have that 
capability?  If so, where can I find a decent (8 meg or so) card to 
use with it?  And if it doesn't have that capability, can you direct 
me to a drum module, besides the DMPro, that I can burn samples to?  
I'm having a hard time locating a moodule that can do this.  I have a 
DMPro now but it is going bad and it is very difficult to find 
support since they basically discontinued them. I want something new 
with the latest technology.  Thanks in advance for any help you can 
give! 


Chris