Replacing Codes site wide with replace Option in Front Page 2002

Cant get this done with G Adsense codes

[newborn]

Hello I use Front Page 2002 and I want to replace adsense codes with another set of adsense codes using borders and images, however the replace function only allows me to change code in a line function. So code such as:
<script type="text/javascript"><!--
google_ad_client = "pub-#*$!#*$!#*$!#*$!#*$!x
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text";
//2006-10-10: My Site Channel
google_ad_channel ="#*$!#*$!#*$!#*$!x";
//--></script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>

written in the exact same way. If I attempt to highlight it and copy the only section that it will replace will be the first line.
Because the ad is written in this way It seems that I cant replace it. How can I sort this out. Is there a function that I can wholesale replace the codes accross the website.
Help here guys there are over 800 pages

[bill]

One of the feature advances in FP2003 is the ability to find and replace multiple lines of code site-wide. It's a worthwhile update in many ways.

[newborn]

If I already have Front Page 2002 do I need to buy Front Page 2003?

[bill]

It's not a free upgrade if that's what you're asking. You need to purchase the Upgrade Version, which is cheaper than the full version. (Also look at the Academic Versions if you qualify.)

[The Contractor]

You can also use a bit of software like "Search and Replace" which is a must have piece of software in my opinion.

Maybe in the future you could put your AdSense code into "web includes" in FP or use SSIs so you only need to change one/couple files to change site wide.