1. Go into edit mode on your workspace by clicking the "Edit" tab.
2. Click the "Insert Plugin" button
3. Choose "Photo slideshow" in the Video & Photo category.

   

    

4. At Slide.com, you need to create a slideshow first.  When you create your slideshow, you'll see a box labled "or copy this code" beneath it with embed code:

   

   Copy this code, and paste it into the plugin box.

    

5. Click "Preview," then "OK," and now "Save" your workspace page

Note: This plugin will only allow code from Slide.com to be embedded.  To insert code from other photo-sharing websites, use the HTML/Javascript plugin.