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

Anybody out there interested, I am looking to trade the stock rom 
from my mp-7 for maybe a proteus pop rom, protean drum rom, or maybe 
another.  It just doesn't really suit my needs.  Make me an offer. 
Incidentily, can I replace it with any other rom without losing the 
functionality of the MP-7, like the ability to save patterns, songs, 
and multisteps? Is that stuff stored seperatly?  Also, do ROMS add 
user banks as well?  Thanks...