No, I mean, you can reverse engineer the Macbook. But... for the cost of breaking the Macbook, you would be better off with either an RCA to VGA connection box on a monitor, but realize, after about 15 inches of monitor the games will start to look really crappy.
As of now I doubt there is any form of HDMI to DVI/VGA box/cable out. Even so, there might be a major quality loss. Your best bet is to get a computer monitor either from Dell or HP that allows multiple inputs. You will see the inputs either on the box or whatever.
EDIT -
http://www.optimization-world.com/products/catid/4.html. I found this, problem is it won't work in your situation as I don't think the PS3 outputs such, I know the Xbox 360 Elite does so..
EDIT - Actually, doing some research the PS3 does support an HDMI cable. But, if you don't have the monitor none of this does you any good. You can get a good sized monitor, oh about 20-24 inches for about 220-350 with DVI and multiple other ports available on the backside. One monitor I recommend is the HP w1907 22inch Widescreen. It's not too big but just big enough to get what I want done. It's a glossy display but the colours are just gorgeous, and it has settings for gaming, video watching, picture viewing, and text viewing which alter the the way things look dramatically. I paid 230.00 for mine, not a bad price!
Good luck wit that...