dynamic field population

hi there,

we're using gravity forms to allow our car club members to register for an event. you can see the form here: http://www.mgcaledonian.com/?gf_page=preview&id=41

we'd also like to use gravity forms to notify members if their registration has been successful following receipt of payment for the event (an offline process).

the sequence of events would go something like this:

1. user completes booking form
2. user makes payment to club using entry ID as a unique reference number
3. club treasurer checks bank statement, takes entry ID and enters it into a gravity form
4. gravity form dynamically populates the other fields in the form with all other details
5. form notification delivers email confirmation message to club member

any help or advice would be much appreciated,

robin

thanks for getting back to me chris,

the event (just for the bigger picture) overview is here:
http://www.mgcaledonian.com/european-event-2013/

the pre-registration form is here:
http://www.mgcaledonian.com/registration-of-interest-page/

essentially we're already capturing things like name, email, etc against a unique gravity ID. we want the club treasurer to be able to enter that ID into a form field (perhaps on one page) and the system to automatically populate the rest of the fields related to that ID (perhaps on the next page). once submitted the notification email from this form would go to the user to inform them that payment has been received - booking is confirmed.

or any other ideas to achieve the same effect!