lat9:
Craig, I've re-looked at this and believe that the functionality (quick way to look at customer's past orders) is already part of Zen Cart.
If you're on your admin's Customers->Orders screen, you'll see a (kind of washed-out) icon to the left of each customer's name. When you hover on the icon, the title-text reads "Preview Customers"; when you click the icon, you're taken to the Customers->Customers page with the associated customer's record highlighted. Clicking the "Orders" button in the right-hand pane then presents you with a list of the customer's previous orders.
Thanks lat9.
I did know of the little icon you can click on. It would just have been a little more convenient for me to have the 'place order' button on orders.php too as when I'm taking a phone order I usually stop on the orders page in the admin so I can see what the customer has ordered in the past and what options and addresses they used.
I'll see if I can test the latest release in a bit. Is there any particular reason to have to enter the admin password? Security/DSS I presume?
All the best.
Craig