I would like to add a new function to the rec button. I know how to change keymap. I've even succesfully changed a couple of buttons in the rec screen, and added the function to recording.c. Now, I'd like to add a button function to the main menu (the one that starts up when rockbox boots. The one with 'Files, Database, Setting, Recording, ...). But I cannot find the switch where I should be putting in the new function.