When you click on a photo there is a button beneath each that says "add to ideabook" simply click on that button and a text box will come up that asks you which of your ideabooks you'd like to add the photo to, or gives you the option of creating a new ideabook.

I hope this helps.

thanks! I finally figured it out-the "add to Ideabook" wasn't showing up, so I started over and there it was - thanks again for taking the time to help!