i dont know if youve tried this but i was having the same problem and i thought i had bricked my phone after i put it in DFU and got all the errors. phone wouldnt turn on restore or anything. all i did was hold home n power untill i heard the pc disconnect chirp then start it back up. mine started back with the 2.0 uncracked software (i restored to 2.0 before trying the jailbreak)
sounds really simple but it worked for me. give it a shot you might just be stuck in DFU mode
I upgrade my 16 gb1st gen phone from 1.1.4 to 2.0 using pwnge . I then tried to restore it again as the phone was working slow but accidentally I restored it with customs 1.1.4... On 7.7 iTunes
Now my phone just shows the cabel and iTunes pic And my iTunes hangs everytime I connect it(I have mac book pro) what do I do please help..