I am using xtreme boot maker which I have done before and for some reason hit a bump lol. 1. Load your floppy disk or connect your USB Flash Drive. (optional) 2. Run Xtreme Boot Maker. 3. Detect your sata chipset, if required. 4. Select destination for files. 5. Open your Xtreme Firmware's .bin file. 6. Click "Prepare Drive". 7. Boot from your prepared drive or your NTFS cd. 8. Type "samread xxxxxxx xxxxx" to backup your 360's original firmware. 9. Type "samhack xxxxxxx xxxxx" to flash the Xtreme firmware. here are the instructions that i have used before and it worked great. now I went to ubgrade to 5.3 firmware and this is what happens. I get to step 8 do as it says and it reads my firmware fine then when i go back to flash it, it says ( hacked.bin for xbox s/n xxxxxxx xxxxx doesen't exhist aborting!) the xxx's are filled in with my serial number. What am I doing wrong? I have done this before thats how i upgraded to 5.2 formware now all of a sudden it dont work.