Okay, but we still need more info--like the exact dimensions of the room, because you might even run into a throw distance issue (given the short wall dimensions, I can't help but think the length is short as well...but maybe not).
Here are some points to ponder...
Say, for example, that you want to use the 72" wall for the screen. Most screens use either a 1.5" or 3" wide frame border, so even if you did want the screen to take up the entire wall, you couldn't do a 72" wide screen...you'd be looking at a 69" or 66" wide screen. Even then, where are you going to put your front left/right speakers? Yes, you can put them under/over the screen, but in your case, you're wanting to use a 4:3 projector on a 16:9 screen, meaning that you're going to have lots of light spill to deal with above and below the screen...light that could turn your speakers into reflecting pools. That issue aside, with a 66" wide screen (37"x66"), the minimum throw distance for the VT45 is right at 10'...plus the 9" depth clearance means that you'll need the room to be a minimum of 11" (to be safe) to even be able to throw a 66" wide image.
