I will be building a psone lcd projector as soon as I'm done enough research and I am wondering how far away from the wall (screen) my box will have to sit. Is there a min/max distance i should know of and does it differ because the psone screen is smaller ?

this might help

http://lumenlab.com/focal_calc.php

good luck.

Omg I can't believe I missed that one. Thank you for the quick post.