Updating a WGA entry?

[DoubleIT]

I regesterd my script back in decemeber with the WGA. Since then I have redone almost all of it, the plot has changed, titles changed , but the characters are the same and a bunch of the scenes are still there. Can I somehow update my entry with the new title and new pages of script or do I have to re-regester it for another 20 dollars?

[DoubleIT]

stupid me

"You may change your work as much as you prefer; however, when the storyline has been affected or changed extensively, it becomes new material and should be registered or documented again in some manner.

It is solely at your discretion to submit multiple drafts or completed drafts of the same work for registration. The Registry does not make comparisons of drafts or material content.

All submissions, including subsequent drafts of existing registrations, are considered completely separate registrations and should be submitted accordingly with the required fees. "

From the WGA site... I guess that means im supposed to update it, although i have to assume that they are going to try and get that 20 bucks out of me whenever they can...