USB-UIRT With RCA DRD430

I am trying to integrate the USB-UIRT with SageTV to change channels with the RCA DRD430 Receiver. Does anyone have the ir file or any idea how to get the unit to either send a 0 before the 3 channel numbers or send a enter code after the 3 channel numbers. My receiver needs 4 digits to change channels. E-mail mikefarb@comcast.net.
Thanks
Thanks