The RU950 can send 433.92MHz RF which is what X-10 uses for RF outside of North America but the protocol for X-10 RF differs from the protocol for X-10 IR commands. CodeGen™ will generate the RF format, IR543, and IR543AH codes.

     [Link: mbx-usa.com]

For getting the RU950 to send RF, you'll need to ask for help in the Pronto forum - I can't help with that.