set up an account at photobucket and upload your images there. Then you can select whatever pictures that you want, but I believe the file size can not be too large to post in your message here. If your files are too big go here
http://www.irfanview.com/ and download this to shrink your image size. Both are free downloads. Once they are in photobucket select the pics and press the generate html tag, then just copy and paste back into your message.