How can I make a powerpoint slideshow function as a screensaver?

I am creating an animated powerpoint show for a Doctors office, and was thinking last night that I dont know how I am going to make it automatically play, like a screensaver. I was thinking I would just cut and paste it into paint- and lose the animation. But I would like to keep the animation if possible. So anyone with a serious soloution please share! Thank You!

Check this out: http://www.pptfaq.com/FAQ00048.htm

Gud idea I dont know if some body here does not know go to your computer shop

Open your PowerPoint presentation
Choose File, Save As
In the "Save as type:" dropdown list box, choose GIF, JPEG or PNG
Browse to your My Pictures folder (it's inside My Documents)
Type in a file name and click Save
When PowerPoint asks if you want to export every slide in the presentation, click Yes. When the export completes, you'll have one image file for each slide in your presentation in your My Pictures folder
Minimize or quit PowerPoint
Rightclick the Windows desktop and choose Properties
Click the Screen Saver tab
In the dropdown listbox under "Screen Saver" choose "My Pictures Slideshow"
Click Settings if you want to fine-tune the results.
Voila. Instant (and free) screensaver from your presentation, albeit one that lacks animation, transition and sounds.

Note: If you don't want to store the pictures in My Pictures, save them to another folder, then in the My Pictures Screen Saver Options dialog box (what you see when you click Settings as described above) click Browse and choose the folder where your pictures live.

change its extention from .ppt to .pps this will make it like a screen saver and then to edit it change it back again

use screensaver software

Right click on the desktop
select properties
click on screen saver
in the screen saver list select "my picture slide show"
click on setting
click on browse
double click your file location and select your presentation name
click on "ok"
click "ok" again
set your wait time and click "Apply"
ok