JP1 Remotes

I've tried all codes listed but for some reason the only thing that seems to work is the power button, and 20675 didn't work at all, my other devices had the same problem, for the TV I found all the codes to program every function on the remote and the person who listed them said he found'em here so ...

Hi I am currently using the master code 20000 with my Comcast Universal Remote to control the older DVD/VCR Emerson unit but all I can do with it is turn the system on and off, if anyone could provide the advanced codes to setup the other functions such as Play, Stop, Fast Forward and Rewind that ...