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

Hi,
On my Px-7, when I create a new 4 layer 'preset' and then go to save it, I can't seem to 
find a blank place to put it. (Unlike songs where there are "empty" slots.) Am I, then, 
overwriting the factory patches when I save over "User" "kit:stadium" for example? 

Also, I stuck an XL-v2 rom in my PX-7 (which is incredible!) but I can't access any of the 
XL-7 patterns/songs like I can the PX-7's... Are songs and patterns not programmed on 
the rom itself?  Would switching the rom slots, (moving the XL-v2 to slot '1') make the 
command station have the patterns, songs, programming, ect of an XL-7?

Also, (finally) in the "presets edit" menu there are many synths that I cant find under the 
"mode/view" presets catagory and so can't seem to use, like the Audity patches, ect...(ie. 
"Audity 2" "gtr: Power 2"...) are these just the sampling bits and not complete presets, or 
can I move them to the usable presets catagory?

Thanks, I've kind of been wondering about these things for a while, and would hate to 
mess up my [beautiful] px-7. This looks like a cool active group for Emu


=J=