got this from
http://www.theadminzone.com - good site for find a bit of info on maybe a few possibilities for forum admins.. Keeps the ad from displaying on certain pages..
HTML Code:
<if condition="THIS_SCRIPT != 'register' AND THIS_SCRIPT != 'search' AND THIS_SCRIPT != 'usercp' AND THIS_SCRIPT != 'sendmessage' AND THIS_SCRIPT != 'profile' AND THIS_SCRIPT != 'private' AND THIS_SCRIPT != 'subscriptions' AND THIS_SCRIPT != 'subscription' AND THIS_SCRIPT != 'member' AND THIS_SCRIPT != 'memberlist' AND THIS_SCRIPT != 'faq'">
Google AdSense Info
</if>