First, you'll need to define the _gaq variable and load in the analytics script from googles server. After that, you should be able to call the 'push' method.
Be sure to substitute
'UA-XXXXXXX-X' with your account ID.
After that's done, load up the page in your browser, open up the console, and look in the network tab. Try loading a few pages to verify that it's asynchronously pushing data to googles servers.
Google uses a .gif image for tracking, so you might try filtering by image and to find request for a file called __utm.gif