Personally, I would apply the AUX 155 code to each device I was going to use, then, plan out my LCD labels for each device using a piece of paper or one of the LCD label planners found
here. Think about which commands (that aren't on the hard-labeled buttons) you use the most for a particular device and place them on the first page of your LCD buttons for that device. I would then edit all the labels accordingly and then just line up each original remote and learn away. YMMV.