Everything is installed now
Screen:
I decided to put up a chain to each side of the screen, just in case that the one of the Z expanders fail (which I doubt). If one should fail, the chain is tight to another Z expander, two of them failing in a row is not likely to happen.
Shelf:
On the other side of the room, a wood shelf. Instalation was easy. It is rated to hold up to 30kg (66lb), and it will hold the projector and the laptop while playing.
Speakers:
Placing properly the 7.1 system was easy, I had it in place to watch movies on the laptop screen. I just had to put some nails here and there to hold the speakers. The rear speakers are now in one wall of the room while the front ones are on the other one.
Laptop:
I just had to buy a USB extension. First I bought a 4.5m one but the puter would not see the external soundcard. I had to go out and buy a 3m one and now it all works fine. Thou I'm considering in buying a hub or something to make a permanent installation of the USB cable.
All in all, doing some math I have the equivalent of a 78in 16x9 screen or a 90in 4x3 screen.
MOVIE TIME!!!