Thanks Krileon. Would the workflow option simply not allow showing of the plan?
I would like the new member to be able to fill in the registration form however they must enter a pre-selected pin in a field to proceed to activate the plan. Pins would be different across plans but are known in advance.
For example to sign up to plan A the member would enter 1111. To sign up to plan B the member would be required to enter 2222. The pin does not determine the plan it is simply a lock to allow "unlocking" of the plan.[/strike]
Many thanks, Matt.