Create multivariation listing option in zen cart. At the moment if the product has variations(different sizes) for each size it shows "add 20$" What's needed - customer should be able to pick the variation(size) and see the full price for this [url removed, login to view] ideally variations should be linked to the images(if possible) perfect example - multivariation listings on ebay.
the second(small) job - set shipping zones depending on the country and tax(VAT) on all products.
On top of that - looking for advice and support(when needed) on zen cart.
If you need more details - email me