For Mac owners wishing to insert photos in a post or avatar and have "no button mice" so cannot "right click".
Locate the image you wish to use in the photo album.
"Control click" on it and "open image in new window"
"copy" the URL address that appears
For a larger image, double click on the thumb nail then
"Control click" on the larger image and "open image in new window"
"copy" the URL address that appears
Return to the forums and "paste" it in your post or personal avatar settings following instructions posted elsewhere in this FAQ / Website Technical Support / Suggestion Box section.
For the purpose of demonstration while waiting approval of my photo I will use rebelbeach's steering wheel.