Here's how I did it on a page. Just cut and paste the code, and change your redirects, images, etc.
Code:
<HTML>
<HEAD>
<META HTTP-EQUIV="REFRESH" CONTENT="10;URL=http://www.blackthornsystems.com/warspy">
<TITLE>WarSpy</TITLE>
<META http-equiv=Content-Type content="text/html; charset=windows-1252">
</HEAD>
<BODY text="#ffffff" vLink="#ff00ff" link="#00ffff" bgColor="#000000" background="grid.png">
<IMG src="warspy.png" border=0>
<hr>
<font face="verdana, arial, helvetica, sans-serif"><br>
<font size="2">
<P>WarSpy.Net is not operational yet. You are being redirected to the
temporary page located at <a href="http://www.blackthornsystems.com/warspy">www.blackthornsystems.com/warspy</a>.</font></font></p>
<br>
<font face="verdana, arial, helvetica, sans-serif"><br>
<font size="2">You will be redirected there in approximately 10 seconds, or please click <a href="http://www.blackthornsystems.com/warspy">here</a>
to go there immediately.</font></font></p>
</BODY>
</HTML>