Special link invite, when user joins is automatic dropped into usergroup #

[Vaupell]

okay, guess noone could use this..

does anyone know, would it be possible to make a duplicate registration
form, and simply edit it to fit whats needed.

removed alot, but most importent added 1 item
the invitation code that is checked against a reference preferable in db
then dropping the user in a usergroup for that code..

exsample
user : tom, registrates with the invitation code "offer31"

if invitation code = true
add user to usergroup = "special group
else
add user to usergroup = "normal
/if