Never mind guys found it, for those who want it, here is the code:
Code: 
<if="ipb.member['id'] == 0">
Your guest message goes here!  Register now.
</if>
dangerbakili Reviewed by dangerbakili on . Register Image Notice Never mind guys found it, for those who want it, here is the code: <if="ipb.member == 0"> Your guest message goes here! Register now. </if> Rating: 5