Bc2000 (for the BCF2000 & BCR2000)

Hello everyone,
I am new here and looking for help in controlling KORG OASYS PCI dsp with BCR2000. I have been trying to use BC Manager as well as BCReditor to program encoders to control parameter values of any synth in my OASYS PCI, but no luck so far. The problem probabely lies in the sysex format OASYS PCI supports - each sysex message has 14 bytes and four of them stores parameter value. In BCmanager or BCReditor one can assign just 2-byte value for a parameter, or am I missing something?
Would anyone on the forum help me, maybe what I am trying to do is not possible to achieve?
I will appreciate any hint.
Thanks in advance.