try the one man band site. it has a great
insite on style construction.
also:Jørgen Sørensen
and gunter nagler at gnmidi.com
all these sites are very detailed
in style logic and construction.
the program one man band is very good at this,although it is designed for the yamaha.
the concept and logic is the same for all
keyboards. i've used it for korg,roland and
yamaha.
good luck