creloaded subproducts dropdown

I need small oscommerce CRE Loaded [login to view URL] file modification. in creloaded 6.2 there is possibility to add subproducts to every product. Subproducts are listed below product description on product info page. I need to show subproducts in dropdown list (like attributtes) after choose subproduct i need to display price, extra fields, and image for choosen subproduct (it should be done in java script - i do not want reload page) it should change every time i choose other subproduct from dropdown list. Dropdown list should include only subproduct name, other information should be display below. PLEASE BID ONLY IF YOU KNOW HOW TO DO IT.