@ossobuco,
For any photo that is not one of your own sitting somewhere on your own computer, but instead is somewhere from the web:
1) if it's a photo in the middle of an article, click on the photo and choose "show image in another window", then highlight and copy that url (the line above on the screen that starts with
http:// and should end in jpg. or gif.)
2) paste that into the reply box on a2k and then
3) highlight that, and click on Img in the bcc button selection
4) or put these at the beginning and end of that highlighted url manually -
[img] and at the end [/img]
At least that's how it works with a mac, and with a pc it is very similar but I don't remember the details.
If it's a google images photo, google has changed its image urls recently. They only work for me now if the url is short, for example, seven inches, instead of going on forever in some kind of hundred character format (the first bunch of google images on a page are apt to be the long ones). Neither of these now end in jpg. or gif., at least that I've seen.
Sometimes google images takes you to the photo showing up over an obvious page with same photo on it. Then you click X on that overlying photo and do the whole thing as above 1) to 4).
For a photo of your own on your own computer - then you have to transfer/upload it to a photo site such as photobucket so you can get an url that ends in jpg. or gif.