Sure, go to http://imageshack.us/
Click on "Upload"
Locate the photo from your computer
Press "OK"
Scroll down and you will see a URL for your newly uploaded pic
e.g. http://us.imageshack/server1/landypic1.jpg
Copy and past that on here after pressing the image icon (on the bar just above this box next to the smilies)
If you get stuck send me a PM
Alex