Hi Tess,
I haven't used this exact projector before, but I have used a few various models in the past and typically, they behave just like large screens that display whatever would normally be displayed on your computer screen. I would suggest using the CD-Rom feature to make a portable slide show. You could then copy the contents of the CD to the laptop that will be used for the presentation. Running from the hard drive as opposed to the CD will give you a little bit better performance, especially if you are trying to sync up any pictures and music. If your slide show runs well on the laptop as it should, I can't think of any reason why it wouldn't simply project on to the large screen.

Good luck! Thanks--
Brad