Radeon 9550 -> 9600 Software Mod

ATI has lately introduced Radeon 9550 for 350 PLN. It turned out to be equipped with the exact same core that Radeon 9600 ( RV350) and the only difference is slower timing. Everything else is the same : four rendering streams, DirectC 9.0 support and 128bit memory bus ( we can also find 64bit bus models but those do not cope with any computer games ). Why don’t we then modify our Radon 9550 and with not so much effort get Radeon9600PRO or even XT?