Moving to site feed back/help section.
You would use the smae BB code that would normally be used when posting a message. It can be added in your profile above or below where you have written:
Darling it's better
Down where it's wetter
Take it from me!
~*~ Coralena ~*~
use the code [img] [/img] in the middle you place the URL of where the image is located and then hit the update your button at the bottom.