Include Order details in custom template

[TiRo]

Hello,

 

I've planned to create a summary of the products in the last ordering step.

First I've tried to just include the order-detail.tpl in the payment method module (which is the last step), which of course failed.

 

Is there any easy way to just display the products which are going to be ordered/in the cart?

 

(and one-page-checkout isn't the solution to this, because it also links to the payment method without displaying Order informations as last step. According to new german right every Information has to be on the last order-step)

 

Thanks for Help.