what i thought was just using this
<img src="http://x.smfforfree.com/index.php?action=verificationcode;rand=78737899dbf268988283e884e525e997" alt="Please enter the code in the image above to send this pm." /><br />
<a href="http://x.smfforfree.com/index.php?action=verificationcode;rand=78737899dbf268988283e884e525e997;sound" onclick="return reqWin(this.href, 400, 120);">Listen to the Letters</a><br /><br />
<input type="text" name="visual_verification_code" size="30" tabindex="4" />
<div class="smalltext">Please enter the code in the image above to send this pm.</div>
lol(just put it like on top of the pm box part)(i think)