Woocommerce product filtering setup in plugin XforWoocommerce Product Filter

Tricky job, so please read it all before bidding: Need help with setup of XforWoocommerce Product Filter at webshop. Our shop has among other things wheels for products, and all these wheels has been given 3-4 categories. Like here: [login to view URL]×20-51143-et45/ That product has been given the 4 categories 20″ and 5×114 and CV10 and vossen as you see. Its the brand and sizes etc. What I need is a sorting, so that if customer goes here at a category listing: [login to view URL] then there is a sorting for all the categories that these 1337 products has. Like 16″ and 17″ and 18″ and 19″ etc. But not ALL categories in the entire shop. So the customer can choose maybe 18″, and then only the products with the 18″ category are shown. And then if customer needs them in 5×114 and click it (which also has been put in as a category), then only 18″ and 5×114 wheels are shown in the listing. Its the same sorting like they have on our suppliers shop, if you see this link and scroll a bit down and see the left sidebar: [login to view URL] We have the XforWoocommerce Product Filter at webshop, and it should be able to do this job from the categories - I just can't get it to work. Can you? It is not possible for us to put in attributes etc. for the products. This filtering/sorting needs to be done from the categories. Need it today!