First upload pics to a photo-hosting site like Flickr, Picasa, Photobucket, etc. while viewing the pic there, you will find a path to the HTML CODE for that picture. The path usually starts with the link, "Share." Once you locate the code, copy and then paste into your message. Can paste code for multiple pictures. Watch that you do not accidentally get the code for thumbnails or small pictures. Once you paste the code, you will see picture(s) in the message preview (to know if you got it right.)

Thanks!