Windows\system32\config\system being corrupte

Hello,
My PC cannot start windows XP it comes with this error message: "windows\system32\config\system being missing or corrupted". So i have tried to fix it with xp cd but at startup again it comes with this error message STOP:0000221 Unknown Hard error \systemroot\System32\ntdll.ll . So there is noway that i can go to recovery console on the cd to repair windows. I have no idea to fix this STOP:0000221 error.... so can any body help me plxxxx.. Any help with this would be greatly appreciated im realllly stuck!!! Thanks!!