i want a ms windows slide show programme that automatically adds and
auto rotates any new images that are placed into a selected folder.It
wouls also be good if it could display the image number as well.

If I understand correctly, this is actually an included feature with Windows XP. 

1. Right-mouse on your desktop selecting Properties
2. Select the Screen Saver tab
3. Using the Screen saver drop down, select "My Picture Slideshow"
4. Click the Settings button
5. Click the Browse button to select the desired source folder
6. Use the slider bar labeled "How big should pictures be?" shoving it
to 100% to consume the entire screen.
7. Click OK twice to accept

Sit back and enjoy the show when your screen saver kicks in. 

Jeff...