How to wrap some items with jQuery?

I have this code which I can't directly modify:

<div id="registerMessage"> 
   <div class="pageTitle" style="padding:0px 0px 5px 0px;">
      Register 
   </div> 
   Some bla bla bla
</div>

<input type="hidden" name="ardir" value="" /> 
<input name="action" type="hidden" value="insert" /> 
<label>Email </label>
<div>
   <input  name="user[email]" id="user[email]" type="text" value=""  size="35" class="inputReg" />
</div>

<label>Password (5 chars)</label>
<div>
   <input name="user[passwd]" type="password" value=""  size="35" class="inputReg" />
</div>

<label>Password (confirm)</label>
<div>
   <input name="user[password_confirm]" type="password" value=""  size="35" class="inputReg" />
</div>

<div id="memomessage">
    (Other bla bla bal)
</div>            

I need to wrap from the first label to the last div (memomessage excluded) into a new div:

<div id="registerBox"> the code of before </div>

$('label:first').nextAll().andSelf().not('#memomessage').wrapAll('<div id="registerBox">') 

Here's a fiddle