In order to assist you further, I've sent you an email with the installation brochure attached. I suggest installing your TV bracket first before you install the lining board. This will then make it a lot easier as you can just cut the lining to fit the bracket rather than the other way around.
The installation method is straightforward and only requires you to use countersunk screws to drill the lining board into your wall. The lining panels go over each other providing a seamless look and at the same time hiding the screws you used.