Download alphabase from here ROLAND MKS-50 SYNTHESIZER UTILITIES
Freeware, then connect the MKS via midi to the pc, if it responds to the Alphabase software you can then connect the BCR to the pc via midi and map (learn) from the Alphabase output, I've just tried it and the BCR does map the sysex output, some editing of the parameters might be necessary after mapping but you are 90% of the way done.
Hope this helps