Add filters to a online shop (not oscommerce)

Hello Bidders. Here is what i need. I have a e-shop in progress. All the features are in place, but it still needs a few. I need filters added to categories view. Basically the user goes to a category page and sees the list of products. Above there will be the filters for restricting the products viewed. For example.. if you were in the monitors page, you can filter by inches, manufacturers, and so on. All of these fields will be ofcourse in the add product page from admin. More details will be given by PM. This is a 5-6 hours work at a max which i can do by myself, but i have too much work on my hands. So do not bid high, because i know the price for this work :) Thank you very much, and happy bidding.