Half thru struggling to set up Virtuemart for my online software store I came across HikaShop and suddenly things started to make sense. I have upgraded to the commercial version because Nicolas and his team really deserve a reward their unstinting support. I cannot recommend HikaShop too highly. The documentation on their website is clear and gets you started, and there's lot's of detail in the forum too. And the bottom line is that Nicolas and his team do not allow anything to fall thru the cracks. Just great!