yea,you can,,,,,,you gotta have some place to store the pics on the web first off, such as yahoo or tripod have free web space and are easy to use,,,so you upload the pics to the web,then,right click on the stored pics to find the address(url) of the now stored pics.....then you can type or paste the url into the image button thing below,as your posting the thread.
and your image should appear in the field along with any text......