Some people have noted problems with the ATI HD2600XT update (fan noise, etc.). As you are no doubt aware, Apple does not provide a method of reversing the update. Enter stage right ATIFlash: http://www.techpowerup.com/downloads/855/ATIFlash_3.49.html Does anyone have any experience of using this with Apple cards to backup and restore the ROM? Is it possible, dangerous, etc.? Thanks.  I'm not sure if ROM is quite the name. But you know what I mean.