A teacher I help at school found some funding to buy a projector. It is to be mounted on a bracket near the ceiling of a computer lab and used to project onto a screen (or a blank wall) whatever is on the display of the teacher's Power Mac G4, so she can give demonstrations. I don't know the budget yet, but they have asked me for advice, so I'm asking all of you. What type of projector is needed? What features are required? How does it connect to the Power Mac? How far can the projector be from the Power Mac? It's a tower; does it matter exactly what Power Mac model it is? What are the main brands of projectors? What web sites can I go to to learn more? Your help would be appreciated, since I know nothing about projectors but want to steer them in the right direction.