You might want to ask on the projector forum. I'm an RPTV guy myself, but basically what I suggest is that you think about what kind of resolution and refresh rate you want as a goal. The resolution you need is a function of the screen image size and viewing distance (well, and the beam spot size.) 480p is barely tolerable with a 55" image at 8 feet, but once you step back to 14 feet, you might not notice the difference between 480p and 1080i. 1800x1200i at 72 Hz on a large screen would rock.
Once you decide on a goal resolution, then use Powerstrip => Display profiles => advanced timing options => custom resolutions and see if you can fit the resolution you want within the vertical/horizontal refresh rates of a given candidate projector. Oh, you may need to set your Windows monitor to a mondo front projector first, like the Sony GDM-W900, or to your candidate projector if Windows has it. If that works out, the projector should sync to what you want. That's not 100% of the equation - there is still the question of what it actually looks like at that resolution - but at least it might narrow down your list of candidates.
<FONT size="1">Philips 60PP9601, join the Philips_HDTV discussion group
DirecTV, Hughes Platinum & Gold receivers
Sony SVR-2000 TiVo upgraded to 128 hours basic quality
HTPC: Duron 750, K7 Master, Radeon LE w/TV-out, Cybermail, Toshiba M1201B 5X DVD, IRMan
Kenwood VR-407 receiver & subwoofer (blush)
nOrh 4.0 marble center speaker, 4 more soon</FONT s>