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

I should have been more specific with what I am using - I want learn 
how to sequence these basslines on my xl 7 - (no other roms) and mean 
while external gear will utilized as well but I just want to know what 
parameters I need to change because the knobs in quick edit don't do 
enough of what I am trying to do - like amp release up (amp vel up as 
well - to get it as loud as I can) sustain up and delay all the way up 
as well - I was under the impression that I could take a bass drum 
sound like kick 2 and tweak it so that instead of its quick attack and  
quick release that happens over only around one or two eight notes at 
most, instead I could tweak its parameters so that it's note on value 
endures at around the same velocity curve (or the same velocity would 
be great too) through out a whole couple of 4 bars or what ever I tell 
it to depending on the values it would be assigned to - what I am 
wondering is if that would be sysEx information I need to change (which 
is what I was assuming - as apposed to just altering the ADSR envelopes 
and LFO ) - and if so could someone please help me out changing the 
sysEx information so I know how to do it in the future - please please 
please -