XF 1.5 Adding a second row on Rich-Text Editor with Smilies


Hi, recently bought XF and love it so far.

As title says, how would I go about adding a second row underneath the main row of rich-text editor and display smilies? I downloaded this addon but I can't find a way to add smilies on there.

Of course I'm talking about displaying smilies as a button itself instead of the current default single button that you click that spawn a row of them.