If you are using Security Assist you can do this by creating a new rules for both statuses. You can then use these rules in the show region Security Assist server behavior.
On the profile page if the user has a status of one display the profile form and the submit button. If status is two display the profile form and hide the submit button and show the additional fields and the alternative submit button.
This way you can use the same page for both of these things. When it comes to the updates on this page there will be two. One for the profile and another for you table b. For the profile update you can choose based on same page submit, and for the additional update you can base it off of one of the required form fields for the additional info.
Please post back with any questions that you have about any part of this and we will be glad to help you get going in the rite direction with this.
Eric, thank you for your response.
I have successfully applied the session variable to determine the user status and have applied it to a couple of in-page show region server behaviours - this seems to be working well.
Because the fields in table B will total over 15, i have decided that I would prefer they are managed on a separate page.
I therefore think i'm going to need some fancy footwork to accomplish this behaviour.
For example, when a registered user logs in, I'm providing a link to this separate page containing the 15 plus fields, where the user can add or update the data in table B.
Any ideas on how I could approach this?