Instead of using Quick Reply go to Post Reply.
Then on the left hand side there is the Smilie Box, below that is More Smilies then Even More Smilies.
Click Even More Smilies, scroll down til you see the one you want to use.
Click it, and then copy down the URL that is in the address bar.
Come back to the Post Reply page.
Put the URL in IMG tags.
Then send.