You don't have to start a new thread - click on "reply to topic" instead of typing into the quick reply box, and you'll come up with a screen that has "insert picture" again.
Here's the pic of the other side, from the other thread (which will eventually be deleted):

Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis