Bc2000 (for the BCF2000 & BCR2000)

In the ad for BCR, Behringer says, "Those who prefer knobs over faders 
will want to check out the BCR2000, with 24 high-resolution encoders 
that feature LED rings and an additional push function. These 
illuminated buttons are assignable to various MIDI functions including 
note on/off, control change, program change, MMC, and SysEx."

I was told by Kawai, "If this is true, then you should be able to 
assign System Exclusive strings with a variable controlled by the 
knob/slider position to get at some of those XD5 parameters in your 
list."  

I'm using BC Edit 0.2 beta 3 and I've gone through every knob/button 
setting but I cannot find anything that assigns System Exclusive or 
variables. 
Please tell me how to create and assign a SysEx string and variable to 
one of the buttons 01-08 or preferably 33-48 so I can then apply that 
knowlege to the others.
Thanks