Screen possibilities?

[acritzer]

First off...I am completely new to projectors and screens, so whatever you can throw at me would be helpful. If you can take a look at my gallery that'll give you an idea of what I'm working with. I'm interested in trying to put a manual screen I suppose somewhere on top of the entertainment center. Fairly hidden if possible...used pretty much just for nighttime movies (since the room has a lot of windows). Also, you can see the area where the projector would need to go, from the pic of the surround sound speakers. Any chance this might work?

Thanks.

ps-Don't tell my wife I'm really investigating this idea?