When your looking at your e-mail that you have composed for the person you have made if for there should be a small paperclip and next to that paper clip is a small box that says 'browse'
Click on the box that says browse. After you click on browse all of your pictures, documents, etc. should open in an additional window.
Click on the picture you want and than click down at the bottom of the window the box that says save.
It will attatch the picture to the e-mail and should show you the progress as it adds/attatches the picture to your e-mail.
These instructions work for Google mail as well.