Emu XL-7 & MP-7 User's Group

A friend of mine has an XL-7, and I have a PX-7.  We both have ROMs 
that are marked "XL-1" (Xtreme Lead) with commercially printed sticky 
labels, but in his XL-7 (which has no other ROMs) the list of patches do 
not match those in my PX-7 listed under "XL-1".  They're completely 
different - the names of patches are not the same.  Does anyone have any 
suggestions/guesses what might be going on here?  Maybe the "XL-1" in 
his unit is really a mislabelled "XL-7".

Next time I visit him I'll check the numbers on the chips on the ROMs 
and refer to the that .doc file I just posted and see what else that 
tells me.

On a similar vein, where do the factory patterns and songs in the 
control stations reside?  Are they on the voice ROMs, or somewhere else 
(RAM?)  When happens if the factory-included ROM is missing from a 
control station?

Thanks,
A.