Discount module for OsCommerce

I am currently using DISCOUNT PLUS module for OsCommerce. Even though it does it's job, the problem I Have is that it doesn't discount the same product with different attribute. For Example: Full price for product A is 100$. If I buy two A products I have a 50% discount from the total which makes me pay 100$+100$=200$*50%=100$ But if I buy A in red color and A in blue color, the discount is not calculated. I have to pay 200$ I need it to discount with attribute. The contribution I am using can be found at : [login to view URL] I will also need fast results.I must have the work done ASAP