I'm having a few issues with downgrading. I want my iPod Touch 4th gen from ios 6.0.1 back down to 5.1.1, but it's not going so well.
First I tried redsn0w. Logged on to the administrator account in windows xp, launched redsn0w, went to the restore option, selected the 5.1.1 ipsw, fetch blobs...