Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Can you place the wired control box behind the sheetrock wall? Let it hang back there?
Document: I have posted picture of the screen curl. Maybe with many motorized screens that is a problem? A family member has a manual pull down screen and it has not had  a problem with screen curl, it is very flat. The other issue is, this thing is very awkward to wire. you either have to run a new plug in the ceiling, shorten the cord, and mount the giant control box somewhere (the control box is hideous looking and very big). Hardwire it and put your control box behind the wall (what I ended up doing) but you have to make sure to build some type of access door to get to the wires.. Or just run the power cord to an outlet and let all your wires hang out.There are some pros to this.
I just opened the screen and let it hang there for a couple of days. It removed any waves and smell.After a couple of months I realized I was becoming lazy and did not like to use the remotes, either IR or RF to run the screen up and down. The control box was huge and didn't like the way it mounted on the wall. I had read that others have extended the cable from the screen to the control box so I decided I would take a look. Popped open the box and was surprised to find that it was a very simple control system.
One is the hardwired conference room wall mount type with the up, stop, and down buttons mounted on an ugly box. There are 2 wireless remotes as well. One transmits IR signal and the other RF signal. Not really sure why but I guess the RF would be used if you mount this in a place where infrared cannot transmit (in a ceiling case or behind a short header wall).I love being able to retract this so the kids can't get to it. I love being able to hit a button to raise and lower the screen just for the "wow" factor when we have guests.
I purchased the 92" screen for my church sanctuary. It looked great. The setup was very easy. The only problem was that it didn't work straight out of the box. When we held it up to hang it on the wall, the screen fell out of the housing on its own. When we pushed the button for the screen to roll up, nothing happened. I sent it back, and I am waiting for a replacement. I will write a 2nd review once the screen is back in-stock and shipped to the church.
Worked perfectly every time. I relay enjoyed the radio remote, it allowed me to hide the control box behind a wall. The overall build quality was excellent, and it was easy to install.
I ran my cord along the back of the screen housing ( bought some cord mount holders-sticky tape kind ) and mounted the box right behind the housing to the ceiling, then ran the other 5' down the side of the wall hid with the plastic paintable cord hiders you can buy. The 2 remotes work really well also, just remember the one remote has to be in line of site of the box for it to work. I tested out the other remote at the length of my room ( 20' ) works perfect.Also came with a plastic peice to adj the up and down travel length.
I bought this back in Nov 2010. I love it!! The kids love it!!! It was easy to hang, worked no problems. I have a toddler that becomes mesmorized when we put cartoons on it. We watched Megamind the other day and he was in a trance, normally he is all over the place. Well worth the price and more.
Found this product by lucky coincidence when shopping for screens. I was extremely wary of this purchase at first because its price tag was only a little more than a comparably sized pull-down screen, and significantly less than the nearest-priced automated screen. Turned out to be a beautiful, reliable product that I have enthusiastically recommended to others whenever I can. Favi has done an excellent job with attention to detail, even the control box has a removable mounting plate making it a cinch to install/hang. If I was forced to balance this praise with some kind of complaint, I guess it would be the fact that the power cord is a fixed connection from the outlet to the control box and then to the screen, making it difficult to run through a wall.
The only problem is that when I put it back the edges came out curled again after having it up for a few days. Within 6 hours the screen was flat again.2. Controller box connected to power cord - The controller box is placed right in the middle of the power cord. You can't remove it because it contains BOTH the IR and RF receiver (per the Favi support guy). So, I mounted it to the ceiling behind the screen on the left side with the new electrical outlet behind the screen on the right side.
I waited a while to really get a good grasp of the product and write a review after the initial shock and awe wore off. I've had this screen for about a year now. I ordered the 200" screen, which was absurdly large, but the price was amazing and I don't regret it in the slightest. Hanging that thing without a winch was VERY difficult. The screen easily weighs 200 lbs or more. I got the hanging electronics stuck on the ladder I was using and wound up pulling the controller away from the wiring cover and breaking the soft plastic piece that held the wires neatly in place on the control box.
Answer: Yes, but you won't be able to us the IR remote, you'll have to use the RF remote.  Also, the control box is attached to the power cord so you'll have to install an AC outlet behind the drywall to plug it in.