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

Hi,

I just got a used MP7 in the mail and it's great machine.  You can 
count on a bunch of newbie questions from me for the next few weeks 
as I figure this thing out.  So far, I'm really impressed, but it's 
my first synth (unless you count by old Roland TR-505 drum machine) 
and I will need some help to figure this thing out.  I'm an 
experienced bassist and home studio guy, so I'm not totally clueless -
- just about synths.

1.  USB: I don't right now have a MIDI interface for my computer.  Is 
there any way to get the OS update into my box through the USB 
connection, or do I need to buy a MIDI port for my computer?  If I 
need to buy, what's a good, reliable, supercheap 1x1 port?

2.  Factory Restore: Is there a way to clear all the other person's 
user presets and restore factory presets?  Or is that irrelevant 
because the factory presets can't be altered and I just just 
overwrite the old user presets?

3.  AUXES as Inputs: Anybody made use of the auxes as auxiliary 
inputs as described in the manual?   Can you mix levels?  Is there 
anything else cool you can do with it?  The manual appears to suggest 
you can't run the aux input throguh the xx7's filter section but it 
would be super cool if you could.  

I'm really excited about this machine.  Can't wait to start tweaking 
sounds and building my own patterns (I just got through the "instant 
gratification" stuff last night).

Best,
--JES