Mr. Chopper,
you can either:
open a pic (click on it) so that it brings up the gallery page of that pic.
Under the pic where it says "linked thumbnail", COPY it.
(for some reason it won't let you copy just some of it, and it won't copy from my mouse either, so...)
CONTROL-C that entire link.
now when you want to put the pic in a thread, CONTROL-V (paste) it in, then delete the "[/url]" at the end, and everything before the "[img]http..."
Now if you want it bigger, and not thumb-sized, also delete the "/thumbs" that's in the link.
What's a little easier, though it doesn't put them IN the thread is to just
link the pic in the thread for easy access.