not wanting to sound too dumb, but im not 100% sure what ur on about.
If you want to redirect people from an ip block to annother page, you can do it with php.
a very basic way to do it in php is below:
$ip = getenv("REMOTE_ADDR");
if ($ip == "xx.xx.xx.xx")
Header("Location: <a href='http://www.blah.com");' target='_blank'>http://www.blah.com");</a>
im not "one" with cgi so I cant help there, as Kevin said, try hotscripts
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