Defining a more info page template for products is very similar to creating a custom page template, but a little simpler. The more info page definition (template) is part of a product template file, but it defines an entire HTML page. That page contains whatever HTML layout tags and content that you want, plus custom template tags for product information.
This example shows a simple product template that that defines the product name and graphic as hyperlinks of the product has a more info page. At the end of the product template is a simple more info page template.