My first post here.

I've been thinking about a DIY projector for some time and found this site just a few days ago and since then it has taken over me completely. I read and think about it all day, scour ebay for cheap deals and keep cooking up alternative ways to house the thing. And I haven't even started!
Okay, my first question: I'm considering using a smaller monitor than the Fresnel...so will it okay if I get the lenses cut to the size of the LCD? How about if the LCD is
really small, say 4"?
Thanks...this is really a wonderful community. I'm SO looking forward to getting started on my little thing.