Bc2000 (for the BCF2000 & BCR2000)

Using BC Manager -- thank you for the link -- I've figured out how to program custom SysEx strings into the BCR which only use one variable, then to set the range of values for the variable.  That worked.

My next question is, how do you set up strings that use 2-part, high and low value variables?  Example, to modify the pitch of voice 1 of the user voice bank in a Yamaha RM50:

F0 43 10 30 [start, Yamaha, device #, RM50]

03 06 00 00 02 [voice parameter change, user bank, voice 1, "easy voice", pitch]

xx yy [parameter value (high), parameter value (low)]

F7 [end]

Overall, the string would be something like F0 43 10 30 03 06 00 00 02 xx yy F7.  The MIDI specifications in the RM50 manual state that the settings/range for the high parameter are 0-1 high 1bit, and the settings/range for the low parameter are 0-127 low 7 bit.  

So, how do I translate this into BC Manager, then into the BCR?