Add multiple products with custom options in one click

In our webshop we sell mosaic tiles in many different colours. The tiles are added as Simple Products in Magento (version 1.4.1.1). On the category page there should be the ability to: - Add multiple different products to cart with one click - A quantity box for each product - A way to select the package for each product Each tile can be packed in multiple ways (sheet, box, 75pcs) so the customer needs to choose a quantity and the package from a drop down list. When the customer is done he or she can add all selected tiles with one click to the cart. --- - I have the code for showing the drop down list with the packages (the packages are custom options of the product) - I have the code for adding multiple products with one click But these modules will have to be combined so they work together.