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

i know that everybody here is looking for a grafic editor to edit xx7 
patches with the PC. i tried midi quest 9.0 xl with the proteus 2000 
instrument definition, its working at global parameters, but not 
perfectly, 
i ask if sombody has written a instrument definition for xx7 yet, or 
if not let me tell you that it is possible to write individual 
definitions with MQ XL. i dont have to much experience in sysex 
programming, so maybe somebody got some tips...