Make a Screensaver With Pictures

A simple thing to do that greatly depends on your system.

Steps

Create a simple folder in your "My Pictures" (right-click - new - folder) or put it anywhere for that matter, you don't have to name it anything special, copy all the pictures you wish to have for your screensaver into that folder. (putting simple shortcut's of the picture may work too)
Go to your screensaver properties (On your Desktop, Right-click, select Properties, and go to the screensaver tab at the top)
In the screensaver tab, select "My Pictures Slideshow" From the scroll-down menu.
Click on settings, here you can choose the folder that you had recently created with all the pictures you want for the screensaver, and can change some other settings too.
Any other operating-systems other than XP should be pretty much the same, add one if you know how to with any other.

To stop the screensaver, simply go into properties (on desktop right - click and go to properties) In the screensaver tab you can choose another screensaver or simply select "none" to disable any screensaver.