Hopefully you're using the advanced editor. If so, simply upload the pic to the My Pictures tab under the My Stuff section. After that, simply go to the screen where you edit a page, click on the image of an old-timey photo (simply hover your mouse over the icon if you're not sure) and it will allow you to put the image of a previously uploaded image on your page. Now, normally the pic stays on the right side of the page and I don't know how to move it around.
Hope this helps.