Dear ottavioF,
Who said that you can do this using Access?
Looks like someone did mistake. Our plugin Cred allow you add forms to front-end and save posts with padding status.
You can read more at http://wp-types.com/documentation/user-guides/#CRED
PS.
You can create free account at discover-wp.com and check how it works.
Please let me know if you are satisfied with my answer and if I can help you with any other questions you might have.
Regards,
Gen.