If youve got pics on your computer, you can use the "Host an Image" option on here. 6th icon from the left above this reply box.
Use the Browse to find the stored pic on your hard drive, select it and then click "Host it".
When the second mini page appears, left click on the script in the "Image" box and then right click and select "Copy"
Click into this reply box and right click again, selecting "Paste" and the code will be posted in the box here. When you "Send" your message the pic will appear here on the forum.
You can use the "Preview" function to see what its going to look like and change it if you dont fancy it.