My jailbroken Iphone 3g previously ran a 4.1 firmware. Like a noob I updated the firmware via itunes and the Iphone 'crashed' (stuck in recovery mode pretty much) and I can't restore it. I've tried putting it in DFU mode but I receive errors upon restoring such as unknown error (14 or 2003). If anyone could guide me through a working restoration process, I'd appreciate it greatly, thank you.