TalkPHP - Flex Application

Hi guys
I am making a flex flash file to show all the quotes that we have in the DB. - this data will be printed in a xml file but saved inside a php file

What I need is somehow to get the $_GET[q] sent to the following part of my code

Code:

<mx:HTTPService id="stockInfo" url="data/stock.php"

                    result="dataResult(event)" fault="faultResult(event)" resultFormat="object" />

Somehow I need to get the AAPL or any stock quote sent to that stock.php file though the flex file.

I have spent 2 hours looking and cant seem to find it, if you can help that would be great!

Thanks