Edit Flash upload script

We have an FLA file that was made for us. this script will take user data include images they select for uploadng and session ID and posts to our PHP scripts. after the script is completed with uploading the script then displays the flash thank you page. we just need a simple edit to open an external thankyou page and post the ssid variable. we want to define this thankyou page in the embed? html that loads the swf file i have the fla and all php scripts that the swf uses. We need this DONE today so if your gonna bid take note if you cant complete today then dont bid.