downgrade from 4.3 to 4.2.x - need your help !

Hi,

my ATV2 has the the firmware 4.3 (8F455) without JB. I’ve tried to install the JB version of the 4.3 (8F455), but i can’t install/restore the custom firmware in iTunes.

The SeasOnPass Restore-Script failed and if i select manually the AppleTV2,1_4.3_8F455_SP_Restore.ipsw i’ll get the error #1600 (unknown error).

And if i select the older firmware AppleTV2,1_4.3_8F202_SP_Restore.ipsw i’ll get the message “This device isn’t eligible for the requested build.

 

If the ATV2 is jailbroken i want to install XBMC on it, untethered or tethered makes no difference, but the XBMC shouldn’t support firmware 4.4.x (iOS 5).

 

Any Tip’s?

 

THANKS!