Hi! I put the universal code in for my Yamaha receiver and it works great on AUX1. Is there a way to punch through the volume and mute buttons to other components?

I have already 'learned' the volume buttons to AUX2, VCR, and TV but I can't do it for MUTE.

I also have a Sony DVD (330) and could not learn the universal code to AUX2. Is there a good way to do this? I have learned some of the basic keys to AUX2 but fail when trying to memorize the DISPLAY button.

Any help would be greatly appreciated!

Tim