Curious to know how this turned out for you ... I was under the impression that in order to get RC-5 codes into another control system (i.e. CRESTRON)you would have to first put the codes into a PRONTO or equiv and then use the IR codes generated by the PRONTO inside the other system as many control systems to not provide for the RC-5 format.

Hope you were able to make it work, and please, share how you accomplished it !