As long as it has RCA, DVI, or VGA it should work fine. I've used my PowerBook several times on projectors at work and school and have had no problem. I've also used it on my aunts older projection TV and her newer projection HDTV. On the older projection screens they used to warn about burn-in with Nintendo games (because some have stationary backgrounds, or don't move when on pause), if you are worried about that, then I'd suggest NOT using it in clamshell mode (as that would put the stationary menu-bar on the screen) and set the background to change often.
TEG