Simple Template System (STS) 

Lets you create simple HTML templates to customize the look and feel of OSC.

You simply create an HTML page that looks the way you want it to and put in
placeholders for the various elements wherever you want to position them.

For example, you would put "$cartbox" wherever on the page you want the
Shopping Cart box to appear. Put "$categorybox" where you want the Categories
box to appear. Put "$content" wherever you want the main page
content (the central part where all the magic happens) to appear, etc.

It does this by changing only a few /catalog/includes/ files, leaving all
other files untouched, making it easy to add other contributions later.