This task should be easy.
We need PayPal Express to simply show the discount price on the PayPal Express page during checkout and just be able to complete a checkout with the discounted price.
The details of the website are found below.
Website: [url removed, login to view]~sharper2/
Shopping Cart: Oscommerce V2.3.1
Discount Code: TEST
Discount Contribution Installed: CCGV V10.4 for osc2.3.1/2.3.3
Link to Discount Contribution: [url removed, login to view]
After the job is completed, please tell us what files were edited.