what i do is upload all your images to a hosting site like imageshack or photobucket, then just paste the links to the JPG's in your message body and put the image tags around it. you do that by hitting the little button above that Inserts an Image. so it would look something like this.
start of my story...blah blah
[ img ] [url=http://www.photobucket.com/suppicture1.jpg]www.photobucket.com/suppicture1.jpg[/url] [ /img ]
rest of my story blahhhhhhh
[ img ] [url=http://www.photobucket.com/suppicture2.jpg]www.photobucket.com/suppicture2.jpg[/url] [ /img ]
(in the above example, i put an extra space between "[" and "img" so i could display the function