How to create a .slideSaver:
Place a couple of pictures in a folder. Give the folder a name, for instance "Tallyho" and add ".slideSaver" to the end of the name, i.e. "Tallyho.slideSaver". Click the "Add"-button in the dialog that will appear. Done! You now have a .slideSaver, and it was quick, easy and didn't cost you a dime.