You can see my complete tutorial for Premiere Elements 14 on lynda.com, if you're interested. Or you can pick up my even more complete "Muvipix.com Guide to Premiere Elements 14" on Amazon.
Otherwise, I'd recommend you work in Expert view. Then, before you add your photos to the timeline, resize your photos to no larger than 2500x1872 pixels in size (72 ppi). This will save you a lot of headaches later.
Also, since you want your photos to last 3 seconds each, go to Premiere Elements' Preferences (under the Edit menu on a Windows computer) and, on the General page, set Still Image Duration to 90 Frames (if you're on NTSC. If you're using the PAL TV system, set it to 75). Be sure you do this BEFORE you add the photos to your project!
Once you've done that, just use Add Media/From Files and Folders to gather your photos into your Project Assets, then just drag them to your timeline.
As your working, render your timeline (by pressing the Enter key) regularly so that you can see a clear preview of your video.
Tomorrow I will try the slideshow following your instructions first, and then if no luck I will go to Amazon and see what I can find
Thank you very much for your help