Whats the best way to do this? I need to make sure that it will get the HTTP_REFERER parameter since I will put the page up on one domain and park my other domains on top of it.


Via your domain name registrar(or who manages your DNS). FRAME FORWARD your domain name to the following url
http://www.flyparking.com/index.php?use_refer_option=yes

We will get the domain name from the HTTP_REFERER parameter. If you are doing bulk changes this is probably the easiest route. You CANNOT use a standard redirection since this will create problems reading the correct domain name