Got it!
Download this HPUSBFW_BOOTFILES.zip
http://www.4shared.com/file/43544416/39060a9e/HPUSBFW_BOOTFILES.html?s=1
Format usb key with these files, don't check Quick format and select FAT file system.
copy ATIFlash and the bios on the key after the format then reboot.
boot on USB...