2 Questions...

[Michaelaw]

I work with data projectors for living as an A/V technician but have yet to see one calibrated on any show I've done. Usually we get into the projector settings and adjust until it looks its best. Sometimes we feed the signal through a switcher which gives us another level of adjustment. Often on large shows we use two projectors and since the units are always available for daily rental, they all have different hours on the bulbs which means side by side in a ballroom, one maybe dull while the other is very bright. Again we mess with menu output settings on both, to try and bring the two units as close as we can. Spyder pro claims to be able to calibrate projectors but how that is done and its level of complexity is something I can't tell you. I don't think it would work for us because hardly ever would the same laptop and projector be coupled together in a show sense. I realize this doesn't help much but it's all I know about calibrating projectors

As far as protecting your images, you may want to look at using "Flash" as your presentation software as It seems to block any downloads but I think your resolution may suffer a bit. If someone wants a copy of your image though, they can still zoom the browser window and "ALT, print screen" then crop in PS. At least the copy would be mostly unusable in a commercial sense if your res was low enough.