Need some data filling in on the web page before it goes to the cart? Here you go...
You'll need the external script which is here, no need to modify anything on that though, just place it in the same folder as the form page, or link to it.
I've used the current version of FormMail in this instance, you can obviously use your own.
There is a script in the head area of this page, this is to match the email addresses and the mandatory fields.