Rebecca,
Just insert your jpeg pictures in your presentation using Insert - Picture -
From file. You might have to resize them once inserted. Just drag the corner
picture handles if necessary.
If you want a photoalbum, go to Insert - Picture - New Photoalbum - click on
File/drive button - select the folder where your jpeg's reside, select them
using Ctrl+click or shift+click. Click insert. At the bottom of the dialog
you can select how many pictures should be inserted on each slide, once
finished click create button.
If I misunderstood the question altogether, post back.