First question, about the animated gif. Have you figured that out? In your case, two images, dragged into one, sized as needed, jump to IR, use the animation pallette to set the number of frames, timing, looping, etc., then save optimized as gif. Here is a link to the tutorial that I learned from…
http://www.programmingart.com/free/tutorials/irbanner/irbann er.html If you need specific help with implementing that, let me know. As for the jpg slide show, what is its intended use? Web site? Your own (or others’ ) computer? Have you tried IrfanView or other slide show software? I have a really cool screen saver app that I don’t really use much, but it sure makes some great slide shows.
If you need it for the web, then you will need to get a script somewhere in the scripting language your server supports, and there are tons of free scripts. Generally, when trying to get help, it is best to describe the goal you are trying for, what you have done so far, and at which step you run into trouble, being as specific as you can. Lots of details, such as image format, version of Photoshop, and your experience level, are not *always* essential, but help the helper choose an appropriate answer for you