G'day Richard... It doesn't. PFPX opens up the Vatsim pre-file page with all the fields populated with the appropriate output from the plan you have generated. You enter your ID and password manually yourself. Once you've reviewed the fields and entered your ID/password, you then submit using the button on the prefile page at the top right of the form. See https://cert.vatsim.net/fp/file.php hth.