PF-Manual-Registration is a project mainly written in PHP, it's free.
PacketFence Manual Registration
Relased under GPL http://www.gnu.org/licenses/gpl-3.0.txt
Start Apache on a diffrent port for example 8080. Copy pfManualRegistration.php and pfForm.html to your PacketFence box into the root folder of the apache server you made above.
You will have to edit pfManualRegistration.php to change the ldapSever variable on line 16 and the ldapDCRoot variable on line 17. Also on line 89 you will need to change the location of the success page.
As of 11/10/2010 LDAP is the only supported method for auth.