You guys are awesome - and so is Xantech! (Is there anything they DON'T make?!)
Impaqt - I don't want to trigger off the receiver as it will be on when the screen is up often for music only or for sound with an RPTV. The system is a funky one actually. The screen will drop in front of an existing Mits. RPTV in a built-in wall unit for "bigger event" viewing. Component video sources need to be switched between 2 outputs (thinking about Zektor's HDS4.2).
I have done my share of screen drops, but always used a trigger - built into the projector so I never had occasion to investigate. The Xantech (at a first glance) seems to work off a momentary switch, but I think the screen needs constant (probably a way to re-wire that though).
BCM-OZ... Love the idea of hacking a cooling fan on the PJ! ;) That is just the kind of tweak I would do if it were at my own house, but not with a client.
I remain perplexed as to why any manufacturer would leave out a trigger on any projector. It can't be worth more than about $1 in parts on a really bad day.