Those codes I mentioned are not something you can use without a JP1 connection to the remote. They are files of data that can be loaded into some models of remote with an appropriate cable.

If I recall correctly, some models of Comcast remote are compatible with a JP1.2 cable. So if you have such a model and you get the cable, then you could load and test each of those 17 code sets.

More info at:
[Link: hifi-remote.com]