T809 D820 flash program assistance please
 

Am I missing something? I cannot locate a stand alone flash program / software to flash a T809 to a D820. I have a branded T809 and wish to use it on Cingular as a D820. I have searched and read til my eyes ache! I need some help as much as I hate to ask for it!http:///ubb/rolleyes.gif

I do not have an unlock or smart box. I do have the usb cable and Windows XP based system.
Thanks in advance!