As Simon has said you can add other images within the period you are allowed to edit a post (I have done so). After that you can't.
Thanks, that explains my lack of success. The couple of times I tried it, the option to add more pictures was there but all that happened was the thumbnail in the "Latest Photos" section got corrupted. I must have been outside the time limit.
One thing you did not cover is a method of obtaining the url of the image and pasting it in the field.
I thought of that but the trouble is it varies depending on which service you use. Photobucket, for instance, just lets you click a box and it magically appears in the paste buffer.
Ivanford: if you need further assistance with that please shout.
~iw
