I tried using the smilie box with this and didn't like the way it affected the display of the QRB or how it took longer to load the page.
To solve this problem and still enable the use of smilies, I just added a link similar to the "get more" in the normal reply.
If anybody is interested, in the showthread_replybox template replace:
<td bgcolor="{ secondaltcolor}" valign="top" nowrap><normalfont><b>Your Reply:</b></normalfont></td>
with:
<td bgcolor="{ secondaltcolor}" valign="top" nowrap><normalfont><b>Your Reply:</b><br><br>[<a href="javascript

pensmiliewindow(240,280,'')">Get Smilies</a>]</normalfont></td>