[Plugin : Gravity] Update a post with a Gravity Form

Hi,

I use Gravity Form plugin to create posts with users submissions (post with pending status with custom fields auto-binding by the form entry).

==> That I need now : is a second part form to update the post created with the first submission.

For example : sending by mail a link with the post id, to a second form page, that can update the post and complete last part of custom fields.
For example 2 : a link with the post id, to the same form, that can simply update the post.

Anybody have an idea how to do that ?

Thank you !

/Nico