Hi, got pictures sorted
Iam using a hdmi cable i have been using for the bedroom which was 3m and just long enough for the projector. I know its been working but as for quality it cost around £15 so might be a little risky
might stick another in the wall next to it just incase!
As the room is quite some distance from the house, i am leaving the networking until later next year. Already planned the plugs etc for projector, amp etc...etc...
Also placing sockets on all walls and in every corner for power to sub. Not placing wire for sub yet as don't know were to place it, and my understanding is you need to play around with the placement of it anyways.
Will see tonight what's been done today! hopefully the first fix should be complete.
Now, i need to go and demo some speakers, projectors etc....! The wife will be well pleased about that this weekend!!!
Oh! & i've made my first mistake!

As i am wiring for 7.1 i measured the back two speakers in the dark and bought two lots of 2m Qed Silver Anniversary XT speaker cable, but they should of been two lots of 4m
thanks for advice markp.