So I finally got my Yamaha RX-V363 to be controlled by my cable (UEI) remote, now I want to get my Yamaha RX-V363 remote to control my cable box!

This is what I know about the cable box:
It says Comcast on the left front plate and Motorola on the right front plate.
On the back it says nothing and it's big, wide and flat and sort of a brushed flat silvery color.

My Yamaha remote has a button for DTV/CBL BUT the booklet has no codes for cable boxes!

I got some codes, however, from my Universal booklet and the Yamaha accepts the following codes (ie words come on the faceplate screen saying "OK") BUT the remote still does not control channel up or down or power (or any other commands) to the Cable Box. The codes it seems to "accept" are for General Instruments and Jerrold:
0003, 0012 and 0014.