I have been following some recent threads about inexpensive (sub-$2000) front projectors like the Panasonic PT-L300U and it seems that front projectors have some definite advantages (other than the larger screen size) 1) Compact. Occupy only a fraction of the space occupied by an RPTV. Easy to move around. 2) Don't have to worry about burn-in or stretch modes. 3) Don't (hopefully) need expensive ISF calibration. 4) Not as many convergence and geometry issues (not sure if that is true). The Panasonic L300U is definitely within my budget, but I am not sure if I can get the most out of a front projector and that is what I have questions about. I live in an apartment where I can turn a 12'x16' bedroom into a HT room and control the ambient light conditions using blinds/curtains. But I cannot make any permanent installations (such as retractable screens or ceiling mounts). To make matters worse, the walls are painted in a dull off-white color. I was wondering if there is any makeshift screen solution that will allow me to get a decent projected picture (obviously I cannot repaint the walls). Another concern is the positioning of the projector. Can I just place it on top of a bookshelf (assuming I leave 18" of open space behind the projector) and if so how high should I place it ? I have seen some rules of thumb for how far the projector should be from the screen, but I am not sure how high it needs to be to get a picture that doesn't need too much keystone correction. I would appreciate any help I can get. Thanks.