Brendon, Im doing something similar in my reno. Using the clipsal star serve throughout the house as well as running cat 5 and cat 6 cables. cctv plugs into the star serve module, as does my dvd player, ps3, foxtel, internet etc. Tv in every rooom of the house if required. simply flick a channel and the desired viewing is there. run the IR option to control from each viewing point.
theoretically anyway, i'll know once its finished and up and running.
edit:
http://www.cleverhome.com.au/automat...Networking.pdf
check out the link for more info. It is a hardwired setup so you'd need to retrofit, but if you have decent access via the roof space, its not impossible to implement.