This is a pain - apologies for turning the thread into a how-to segment...
Here's the secret, not
entirely explained in the post I linked.
Grab the link from Google, as the post I linked explained that part well.
At the end of the very long link from Google, there is something that looks like this below - the digits represent the size of the image as it will be shown in your post.
Code:
......5HzxFg=w616-h463-no
It needs to be edited to look like this:
Code:
......5HzxFg=w616-h463-no-tmp.jpg
Those final eight characters allows Xenforo to recognize the link as an image.
This can be edited in the 'post image' dialogue when you copy the link from Google into the thread here.
Luck to ya!