EXS 24 Logic Sampler Users Group

Hi,

I am currently working on a Carrillion soundset (A Carillon is a
musical instrument consisting of tuned church bells) 
I have now started to work on the EXS version of the thing and came
across some problems that make it a bit difficult to create the
soundset in the intended way. 
I have now joined this group hoping to find some good advice from
seasoned EXS users. 
These are my questions:

(1) The sound of the bigger bells lasts for up to 30 seconds before it
dies away. It looks like the EXS does not support decay and release
stages longer than 10 seconds. Is there a way to get longer decays (up
to 20 or 30 seconds are required). I do not have a problem with the
version that uses the unlooped full length samples - these can easily
be played in one shot mode. I do however also plan to offer an 'eco'
version of the patch with  looped samples. Here I would need the EXS
envelope to shape the amplitude and the spectral decay.

(2) Each bell has its own decay time. The EXS however only offers one
single envelope setting for the entire instrument. Is there a way to
assign a dedicated envelope setting to each split?

(3) if there is no positive answer to my question (2): I assume the
mod matrix could be used to connect the key number to the
decay/release time using  'Key' as source and env release as
destination.
Unfortunately I only have an early version of the printed handbook and
it does not cover the MKII mod matrix. Q:Is there a resource available
where this topic is explained in greater detail? I would need to know to
which mathematical formula a given setting can be translated in order
to achieve an exactly defined setting. (or maybe somebody around here
has the answer? :-)
 
(4) Some important settings that are characteristic to the instrument
can not be made on the instrument level (envelope, filter). Instead
they are assigned on the plugin UI level and stored apart from the
instrument in a seperate plugin settings file. I am not familiar with
this approach (to say it mildly). After reading the EXS handbook I am
still wondering about the intended workflow. Q:In which form would I
have to supply my sound set to make sure that the instrument is
initially loaded together with the appropriate envelope and filter
settings?

Thanks for any help. 

Andreas Sumerauer