544977 Remove checked option from wp ecommerce admin

Hello, I have wordpress with wp ecommerce installed. The shop is for shirts, so it has two variations: colours and size. When we add a product, if we select colour it show all colour option. Same for size. The problem is that every colour/ every size is checked by default, and become a problem with many combinations. See the attached. The goal: make all theese options unchecked by default, so we could select only colour and size available. I can show you the file I think to be edited (for those who already know the plugin has a path similiar this: public_html/wp-content/plugins/wp-e-commerce/wpsc-admin/includes&file=[login to view URL] ) For a good programmer should be a quick job to receive very good review.