Track Package from FedEx, UPS, Postal, DHL, etc..

[lat9]

So I gave up, deleted my ZC installation and did a new installation of 1.5.7c.
Installed EO 4.6.0 but now I am getting the following error log when I attempt to access a customer order:

"Request URI: /*******/index.php?cmd=edit_orders&page=1&oID=7952&action=edit,
#1 require(/home2/*******/public_html/*******) called at [/home2/*******/public_html/*******/index.php:11]
--> PHP Warning: Use of undefined constant DISPLAY_PRICE_WITH_TAX_ADMIN - assumed 'DISPLAY_PRICE_WITH_TAX_ADMIN' (this will throw an Error in a future version of PHP) in /home2/*******/public_html/******* on line 79.

Request URI: /*******/index.php?cmd=edit_orders&page=1&oID=7952&action=edit, IP address: 107.204.159.118
#1 require(/home2/*******/public_html/*******) called at [/home2/*******/public_html/*******/index.php:11]
--> PHP Warning: Use of undefined constant DISPLAY_PRICE_WITH_TAX - assumed 'DISPLAY_PRICE_WITH_TAX' (this will throw an Error in a future version of PHP) in /home2/*******/public_html/******* on line 79.
"

I have looked but I cannot figure out which file these two constants would be defined in.
Can someone assist with this?

Thank You

We really, really need to be taking the EO related issues to the EO support thread. Those constants should be database configuration settings (Configuration :: My Store :: Display Prices with Tax and Display Prices with Tax in Admin).