Questions on Home Theater Construction

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I hope that some of you with experience can help to get me through some questions regarding the building of my listening room/home theater. Tuesday, we have a pre-construction meeting for my new house.

I am hoping that I can persuade Pulte Homes to install some special Romex 20 amp line cord, to install at least 1 or 2 20 amp lines, and some special outlet receptacles. Obviously it would be better to do this before the walls are all up than after the house is completed.

The room which is on the first floor will be 19' 4" long by 14' 7" wide. The projection screen will be going on (near) the far end of the room along the outer wall of the house (14' 7" wall). In all likelihood I will install an electric drop down screen like a Stewart. I need to install outlets on the ceiling for both the Projector and for the screen.

In a room this large, how far from the rear wall should the projector be installed for a screen between 100" and 110" diagonal. Along with this, how far should the electrical outlet be placed on the ceiling from the rear wall?

For those with the electric type screens, where are the electrical cords attached to the screen. Again as with the Projector, how far should the electrical outlet be placed on the ceiling from the front wall?

Do I need any extra reinforcement in the ceiling to support the projector or the screen?

I am also concerned about weight of equipment near the walls of the room. For the far end of the room (outer building wall) I will be placing all of the 3 main speakers and possibly 2 sub woofers. All of these speakers may have a combined weight of around 1200 pounds. Is this going to be an issue? Will the floor have any weight problems? Does the builder have to reinforce the floor and/or wall?

I also have the same question about the long axis side wall which runs along the garage. The side speaker surround and possibly 200 pound sub, racks with granite platforms, 5 or 6 power amps (65 to 70 pounds each), 135 pound turntable, records and cabinets, other equipment will be placed about 10" from this wall. The weight of all of this equipment could weigh between 2500 and 3000 pounds. Is this going to be an issue? Will the floor have any weight problems? Does the builder have to reinforce the floor and/or the wall?

Thanks for all of your assistance.

Rich