Add functions for a painting shop (osC)

Hi, everyone: First sorry for my bad English. I am trying to express my full ideas here. I am looking for some guy to modify my shop to be a painting shop: [login to view URL] Now it's based on creloaded 6.15 + a template I purchased. I need functions below: Function one: For each painting, customer can choose the size and quality level. For different quality level or different size, I can set different price. And also I hope I can set the size and quality name easily. When customer choose different size, the weight will change. The weight is only depended on size. If size change, then weight will change because I will use weight to calculate the shipping cost. I prefer two ways to do that: Method one, I hope customer can choose size from a drop down menu, then they can choose quality from another drop down menu. Please allow me to set price for different size and quality. If there are 3 quality levels and 4 sizes, then I will set 12 prices and 4 weights for this item. Weight will change only depended on size. Besides, I want to let customer choose their default size and quality level then all the products will be displayed at this default size and default level. Method two: [login to view URL] This way is also acceptable. When I add products, I hope I can set default size, weight and price for each sub category. I have more than 10,000 products to input. So in this way, it can save a lot of time. If you can do all above and let me choose between two methods, that will be great. Then I would like to pay more. So please give me your price for one method or two methods. I will prefere the guy who can do both. Function two: Just like the paintings you see from [login to view URL], all of paintings are displayed in a fram. I like that. And more, I hope I can edit the frame or upload and choose frame. Function three: The 1st level subcategories can be displayed under root category name. Just like 68art.com. I know there is a existing contribution in oscommerce. That' all for this time. If I satisfy your work then a large project will be yours.