After posting, I realized that the answer was already in this thread! I programmed mine as Jack did and now I can control the receiver volume at all times.

Here's what Jack posted and what I did as well(assuming that you want to control volume while in CBL/SAT mode):

CBL/SAT * P *--** 9*9*4* AUX2 VolUp * VolUp **
CBL/SAT * P *--** 9*9*4* AUX2 VolDn * VolDn **
CBL/SAT * P *--** 9*9*4* AUX2 Mute * Mute **

Repeat this programming for each device that you wish to have receiver volume control with.

You will get a lot of programming tips by just printing out this thread! It's long but helpful!

Best of luck!

Sincerely,

Scott Funk