They will if in PowerPoint XP, click Tools | Options | Edit | Disable new features
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Michael Koerner [MS PPT MVP]
Will PowerPoint presentations created in XP run properly
on PowerPoint 2000, using Windows 98 operating system?
Melanie,
If the purpose is just to display and not author on previous versions then
you can make use of the new viewer on older systems to display presentations
authored in 2002/2003 with all the animations.