One other thing, and I hope this doesn't complicate things...
In the excitement of finally seeing the area to enter the credit card information, I didn't notice that there is a button to pay via PayPal at the top of the page. (see shot4.jpg)
Can this PayPal option co-exist with my FirstData gateway so that my customer has the choice of which method to use?
I had unchecked "Use PayPal Express" when setting up the eCart local checkout, so I was surprised to see it there. My customer does have a PayPal account, and I have the API and password info from PayPal, but before I proceed, I wanted to find out what I need to do.
My plan is to start back over with a clean confirm.php locally, run through the steps described in the PDF, but this time enter the PayPal Express information, the upload to the live site. So then, do I need to go into the Admin on the live site and select PayPal Express Only? (If you recall, we currently have AuthorizeNet selected without any other details entered.)