I have a lot of my learned codes stored in buttons I never use. Just nasty looking pages in a device I labeled "learned codes." Now as I fiddle with layouts and such I don't have to worry about lossing a code I need when I erase a button. I simply link the new buttons to the buttons with the codes. This is also nice if you want vol to always be you amp vol. Instead of learning the code 10 times, you learn it once and then link it ten times. Anyway, this is not an original idea but very helpful. It takes some time at first, but saves loads of it later. Good luck.