Random targeted Text link above signature..

[devilinearth]

hello,

i wanna add random targeted text link above signature in first post of all threads..it requires php include statement..

here it's

<?php include ("http://www.xxxxx.com/random.php?id=vvvvv") ?>

question is where i've to add this statement..???

 

[devilinearth]

no one to help me..???