Woocommerce Single Product Page Customization

Hi, I am having an issue with woocommerce that I don't believe is too big a job but my PHP skills left me a number of years ago and I cannot work it out myself. [login to view URL] Above is an image of a scenario very similar to what I require. The company sells towels and in each range of towels there are four different towels as shown in the picture. Currently the product in the picture is classed as a grouped product but I would like it to be a single product with all of the other products in the range being listed with an add to cart and quantity as shown. However, grouped products doesn't allow this and also only allows a product to be linked to one grouped product when I need the situation described to be replicated on every single product page in the range. Basically then what I need is the ability to add existing products along with cart and quantity selector to a number of single product pages. Woothemes seem to think I need to create a loop to get products from the same category as the single product displaying but I am unsure how to do this. James Koster at woothemes did say that this was a start. [login to view URL] Thanks Matt