How to integrate Zen Cart into my website?

I recently came across Zen Cart. I am in the process of developing a PHP website, and already have a user management module etc. I currently have only have a few products that I'm selling (three), so all I need (for now at least), is basically a way to integrate Zen Cart into my web site - are there any instructions et that show how to do this? Thanks

The best way would be to integrate your site INTO Zen cart.
What I mean is, use ZC itself for the extra non-store pages via EZ pages or Define pages.

The other option would be to make both your site and the cart identical in look and function and merge them together.

By using SEO URL's functions and some htaccess trickery you can even make the URLs flow.