the ability to post attachments would have to be set up by the Admin (if he chooses to do so). This option does not appear to be currently turned on.
You should be able to insert images by wrapping the image's URL in img /img tags (which can either be done manually, or by highlighting the URL and hitting the Image button).
I don't know if you can post an image which is not present on the web. My guess is you can't.
Comments
According to
Help -> Posting -> Attachments
the ability to post attachments would have to be set up by the Admin (if he chooses to do so). This option does not appear to be currently turned on.
You should be able to insert images by wrapping the image's URL in img /img tags (which can either be done manually, or by highlighting the URL and hitting the Image button).
I don't know if you can post an image which is not present on the web. My guess is you can't.
ScottyZ