contact fields adding

I want to add 3 additional fields to my contact form.

What files do I need to adjust in order to do this?

I read and tried to implement the band_signup files but it's much more than I need. I ONLY want to add a couple fields.

I seem to be able to add the fields alright, but when I send the test contact to myself, none of the added field info comes through. I must be forgetting to code something somewhere.

Thanks.

The problem seems to be in something I need to code in here:

/modules/pages/contact_us/header_php.php

(This file checks for logic, errors, etc, and if OK, sends the message off to you, by joining all the fields together into the $message variable. It reads info from the form as $_POST['variable'] names.)

What exactly am I looking for in this header_php.php to actually CHANGE?

I need to know this too!