Files needed to bootstrap a second OS on the iPod Touch 4G N81AP
iOS 5.1: Tutorial available here: https://www.reddit.com/r/jailbreak/comments/63oxps/tutorial_untethered_dual_boot_your_ipod_touch_4g/
iOS 5.1.1: No tutorial.
If this is illegal, someone tell me. I don't think this is illegal because according to Apple, posting files like this online is LEGAL as long as it doesn't patch the icloud activation lock thingy.