Under Suffusion Options on Introduction tab you have an option to export all options to a file.
Once you have exported the file you have to copy it using FTP into /wp-content/themes/suffusion/admin/import, create the folder import manually.
Using phpMyAdmin edit the database, look for wp-options table and edit the values for siteurl and home.
A tutorial can be found here
http://www.tamba2.org.uk/wordpress/site-url/
To redirect a website to another one create or replace the index.html file in the website that you want to redirect with this code:
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.0 Transitional//EN”>
<html>
<head>
<title>Your Page Title</title>
<meta http-equiv=”REFRESH” content=”0;url=http://www.the-domain-you-want-to-redirect-to.com”></HEAD>
<BODY>
Optional page text here.
</BODY>
</HTML>