Costom design for osCommerce shop

I need an osCommerce site build that uses the design found at [login to view URL] I will require seperate template files for each of the main pages(home, category, product and checkout procedure) so that I can make changes later on if need be. I would imagine that using the Simple Template System would be the easiests, but if there is another solution you would prefer, I am open to suggestions. All code needs to be standads compliant. Apart from that, it is just a standard installation.