There are three different logins that are required to get into the "My Photo Shop" area.
Event Id and password
This gets you access to the photos that were taken. You can give this number/password to anyone you would like to be able to see the photos.
Your own personal account
Once you have decided to purchase, theres another login that needs to be created to track the orders. This will ask for your Name, Phone address etc. Each person to order photos should have their own ordering login. If you participate in future sessions, this login can be used to order from them all.
Voucher Code
Depending on the photographic session, you may get a voucher code at the time of the photo session.
This code is provided only for paid sessions and provides a way to obtain the 'included' items.
This should be entered at checkout time and will redeem your prepaid amount from certain types of products (mostly download products)