Saving for Multi-Users

[louisxiv]

Hi

I'm in the process of creating a PowerPoint presentation for use by a number of schools in Edinburgh. I'm simply going to burn it onto a number of CDRs for distribution. My concern is that I'm using PowerPoint X for Mac. The schools will have PP but no doubt a mix of Mac and PC versions of various ages/releases.



When I go to save the file the only option that looks likely to be of use is Save As.. Microsoft PowerPoint Document (i.e. I can't save to any earlier versions). Will this be a problem for users of older versions or will they be able to open the file? How would people recommend I avoid any potential problems?

TIA for any advice.

MA