In PowerPoint, click File > Save As.
Under Save as type, select PowerPoint Show (.pps).
If the user does not have PowerPoint, you might want to consider converting
into .exe that contains a PowerPoint Viewer:
"Make a standalone EXE that runs a PowerPoint presentation"
http://www.rdpslides.com/pptfaq/FAQ00575.htm

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Shawn Toh (tohlz)
Microsoft Most Valuable Professional (MVP PowerPoint)
Site Updated: June 08, 2006
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> How do I e-mail a powerpoint slide show and have it automatically play when
> recipient opens the file?
Tara - 09 Jun 2006 17:16 GMT
Huh, it's that easy... That worked PERFECT! Thank you so much!
> In PowerPoint, click File > Save As.
> Under Save as type, select PowerPoint Show (.pps).
[quoted text clipped - 6 lines]
> > How do I e-mail a powerpoint slide show and have it automatically play when
> > recipient opens the file?
Steve - 09 Jun 2006 18:55 GMT
You might want to be careful in converting it to an EXE since many mail
servers (and outlook setups) do not accept .exe files. They might
consider it a virus of sorts.
> In PowerPoint, click File > Save As.
> Under Save as type, select PowerPoint Show (.pps).
[quoted text clipped - 14 lines]
> > How do I e-mail a powerpoint slide show and have it automatically play when
> > recipient opens the file?