Changes in OpenCart extension

I want to change a way how "Product Option Discount" extension works.

Here is a link to extension in OC store:

[url removed, login to view]

As I use ajax and "live price update" on front I need just to swap prices on default shop product template and change a way how prices for options are added in admin.

Front:

just swap option price for logged customer according to his group prices, no tables, nothing else than this same template as is in normal product (just prices have to change)

Admin:

extra TAB with table where you can fast add/change prices

columns are customers groups, rows are options and always is "=" operator

correct URL to extension:
http://www.opencart.com/index.php?route=extension/extension/info&extension_id=1888

Comércio eletrônico PHP

ID do Projeto: #8246015

Sobre o projeto