Thanks for the tip Ray. However, the only instances I can find of the ps4_coupons table are the admin\coupons pages (insert, update, delete, results) admin home page. The only other 2 locations are on the WA-eCart\WA_cart_coupons.php page.
There are 3 pages that require WA_cart_coupons.php (cart_editable.php, pp_expresscheckout.php, process_transactions.php)
I'm either confused and going down the wrong path or just don't know enough to see something in front of my face. I think I'll need some help on this. Please see my PM.