the two key things will be the drop-down menu for versions so users can select which version they add to cart, and the vat/non-vat requirement.
could you give me an idea of what would be involved in the drop-down menu/add to cart button as that's a fundamental requirement, and presumably many other users would need the same thing? the product table and version tables are all in place and working on the page, but i need to add the "add to cart" behaviour to the drop-down list - how would i go about it?
so far as the vat/non vat calculation is concerned, my intention would be to add a field to product table with values 1=vat, or 0=non-vat. i presume e-cart would then allow some kind of rule/calculation along the lines of "if value = 1 add vat amount of 15%, if value =0, add no vat amount.....or something along those lines..?