It’s not that hard once you see what you need to do, although Flickr needs a couple of steps.
I failed to mention it last night, but when you go to retrieve the links from Flickr, still use the BBCode URL, since there’s less to ‘remove’ from the string, than the Embed URL, which is what showed up in your original post over on CPF.
You still have to highlight and remove some of the string, but you won’t have a seizure doing it, as with the really long Embed URL.