If you have NO understand of HTML/PHP then you shouldn't be hacking the board.
If you had to pay for installation, then you really shouldn't be hacking your board, because if you break something, your going to have to pay the installation costs again.
I do agree that the hacks should be documented well, but if you know absolutely nothing about HTML/PHP and you break something, how are you going to be able to track the problem down and fix it?
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