Zen Cart version: 1.3.9h

What file should I be editing if I want to add another button to the customer's order page (the page from within the admin area):



Right now, we added the ability to add this user to our custom roster registration database, but this only happens if we hit the "Capture" button.

The problem is that now we have a policy where we will only charge them once we get 10 or more people into our classes. However, even if we don't capture the money, we still want to add them to the class roster registration database (of course, we have a flag that says whether or not they paid).

We want to add another button that says something like "Pre-Register".

Anyway, where in the code can I find the place to add another button?

Thanks in advance

As a side note, it DOES NOT have to be at that location if it makes it easier to be somewhere else. I.E. if it makes it easier to make another box or something, I'm fine with that.