Autorun for PC and Mac

My dad wants to do a little photo gallery for a client of his, on a CD. They want it to autorun on both PCs and Macs. I figured that doing it in flash with a little html page (on the CD) would be good because it’s a common file extension between the platforms, anyone can read a html page.

But how do I autorun it? I have used autorun.inf a few times for windows, but does it work with non-projector files? And how do you do a similar thing for a Mac?