How can I create a loose-leaf photobook on iPhoto?

Hey!

I have a problem.

I want to create a loose-leaf / soft cover Photobook on iPhoto. (iPhoto '09 version 8.1.2)

I already finished the book and want to buy it now.

When i click the "Buy Now" button a window opens which shows me the details and the price about the book.

It says that it will be a hardcover book, which i cannot change. These ones are way to expensive for me.

But how can i select a softcover book!?

I can't find ANYTHING helpful about this on the internet.

Can anybody help?

It would be great! Thanks