Cool. Homeland security will be glad you got rid of those.
When you're typing a post, below the text box where you type, there's a file attachment feature. Use the Browse... button to find your picture file and open it. Then you hit the "Add the file" button. If you want the picture to be inline, put the cursor in the text box where you want the pic, then hit Place inline button.
The other way is above the text box, there's a tag button called "Img" you find the URL of a picture somewhere else on the web and copy it. Hit the Img tag button, then paste the URL. That's how I did the one above.
When posting pics, it's best to resize them to under 640 pixels wide so it fits on the screen.