Q: pulling photos out of finder for creating a slideshow

On the machine on your signature yes.  You can use the Preview application to open all the photos in a folder, and create a slideshow once they have loaded.

On a Classic Mac operating system from 14 years ago, I recommend using http://www.lemkesoft.com/ GraphicConverter, or the postcard ware:

http://www.mac.org/graphics/jpegview/