Premiere Pro output question

I have a fairly in depth question that I am hoping you more experienced Premiere Pro users can answer. I am putting together a slideshow for my wedding in September that I will be showing at the reception. I used Premiere Pro to put it together with all still images and music. Everything is done and in great shape, however I'm a little confused about one thing. How should I plan on exporting the project if I want it to be played on an LCD projector through my laptop? I am going to hook my laptop up to the LCD projector and show it on a large (entire wall) drop down screen. Should I just export it as an .avi file and play it through Windows Media Player on my laptop or should I export it to a DVD and play the DVD through my laptop in something like InterVideo WinDVD? Also, is 720X480 the highest resolution available for a Premiere Pro project or can I go higher? Finally, if I can go higher, should I? Lots of questions, I know, but I will check back and can answer any other questions if my explanation is not terribly clear.