I've managed to root my device. I wanted to keep my screen awake forever. However when I looked around the Settings, the maximum value is 1 hour in the Display settings. There's a 'never' in Developer settings, but only when device is being charged. I used Tasker to set the timeout to Never, but it gets changed back when I click the Display Settings. I used Android wakelocks but they stop working when they're removed from the memory.
I know those settings are practical enough, but as a geek I would like to know how to get 'Never' appear in my Display Settings.
EDIT: To repeat again, I DO NOT want to use an app or a wakelock to accomplish this. I just would like to have my ROM (/system partition) modifed so that 'Screen timeout: Never' appears in my Settings.