If you download the pics to a host site like www.photobucket.com
, you can use the resizing function the site provides. I think if you resized a pic to 75% it would get it under the 700 width limit, though it depends how big the pic is to start with.
I use a program called ACDSee. It offers a resizing function where you can choose what size to make the pic. I change it to the 700, save it, then download it to Photobucket to post.
Hope that helps.