Awhile ago there was a thread regarding the ability to resize pages to match the users monitor resolution. The clickable script at the top of WPW was mentioned, and it works great. But if you want your pages to automatically adjust themselves here's a script for it.
<script language="JavaScript1.2">
<!--
/*
Screen Size Redirect script (By Robert @
http://members.tripod.com/technological_tinker/)
Submitted to Dynamicdrive.com to feature script in archive
For full source, usage terms, and 100's more DHTML scripts, visit
http://dynamicdrive.com
*/
if (screen.width==800||screen.height==600) //if 800x600
window.location.replace("index2.shtml")
else if (screen.width==640||screen.height==480) //if 640x480
window.location.replace("http://www.microsoft.com")
else if (screen.width==1024||screen.height==768) //if 1024x768
window.location.replace("http://www.dynamicdrive.com")
else //if all else
window.location.replace("http://freewarejava.com")
//-->
</script>
Simply change the ("XXXX") to the page you have set up for each resolution. You can use the same page for the 640 and 600 since not many uses the 640 these days.