i have an aeros (now urc 850 from what i can tell). with my att uverse system i could use the channel up/dn button to control the page up/dn function when i was in the channel guide. now with charter cable and a new guy programming/installing my system, the page up/dn buttons are two soft keys way up at the top of the remote, awkward to reach and this is my most important function. any way to program the channel button to perform this function?