I received your email and a) withdraw my request for a DVD b) have a suggestion on how to stop the freebie sites dropping people directly on the form page.
A simple bit of PHP code on the form page will do it.
At the very top, making sure it is inside a set of delimiters, place the following
* (tech note) Except, rather with Perl's redirect function and also with a cookie, because I don't want to handicap all inbound links in the event of repeat visitors. I'd also like to run a few tests to ensure that the original referrer is preserved, which is definitely useful information.