sorry for the delay, instructions and bundle for AppleTV 4.2 tethered jailbreak:
read the READ ME in its ENTIRETY, any questions asked that are answered in that document won't be answered. - to quote Red Barklay "this one's not for greenhorns", I highly recommend only undertaking this if you are an AppleTV developer. (read the entire tweet too, won't repeat anything answered in there either)
unfortunately I've wasted more time (kind of a theme here) trying to get a modified custom package working, it only ended up making apt REALLY unpredictable. i also do NOT recommend installing any packages for cydia in PwnageTool, that also produces very odd/unpredictable results.
Lowtide.app has been renamed to AppleTV.app, so any frappliances installed through nitoTV or apt-get will currently not show up without moving the plugins or creating system links. this i also will not repeat :)