hi,

On my site, When a user makes a conversion (conversion = fills in a form), he received a unique ID from the system (unique meaning no two clients can have the same ID).

Is it possible to track for every unique ID on GA, e.g. where this specific user came from (the entire referring url – including tracking parameters)

i want to implement Custom variables in my GA code, and i require assistance:
1. where exactly do i add the code?

this is the code snippet:
Code:
_gaq.push(['_setCustomVar',
      1,               //Custom var's slot.
      'User ID',   //Custom var's name.
      'xxxxxxxx',            //Custom var's value. The ID of the visitor.
      1                            //Custom var's scope. The visitor-level scope.
 ]);
what and where exactly i place the PHP parameter that holds the unique id that i'm catching after each conversion?