So we use zen-cart edited with respect, there are not major in depth code edits.

I have been trying to bypass the payment step of checkout and I can not find where the progression of the pages trace through.

The idea is this is being pitched as a demo run version of front end for a client.
They don't need payment details for this, and it will be eventually producing a invoice after the order is checked out.

I want to just have them view for the demo..
Shipping Checkout and the next page would be confirmation.

How do I supply the payment needs or just have the main_page follow through to checkout?

If any of the gurus know how this is accessed I would greatly appreciate this.