It's easy. Just type whatever you want in the dialog box, as you did with your first post. Then scroll down below the "Submit . . ." box, in the "Additional Options area, you'll find a box with "Manage Attachments". Click on that and you'll have a new box or window pop up. Click on "Browse" and find the picture on your computer and either open or double click it. You can then "Browse" again, if you wish to add another picture. When you have the one(s) you want, click on "upload", then after it uploads, close that box or window and click on the "Submit . . ." button below the "Manage Attachments" button.
Bird-- hope you don't mind the posting without your copyright notice..