Hey Bill, welcome to Snow and Mud, I hope you find it one of the best places on the web to hang.
To post pics, once in the "post" screen, scroll down to "Manage Attachments", once you click that, a smaller screen will open giving you the options of where to get your pics from. Click on a "browse" tab....it will automatically take you to your pictures file in "my documents". Click on the pics you want, one at a time, only one in each "browse" tab. After you pic the ones you want click "upload". Once "uploaded", click "close this window" (top right).
The pics are now attached to your post, you then "submit reply"