Thanks a lot. I will get my sisters Nook tomorrow. I first thought of starting to find a way of cloning Nooks, but now I will do this one manually and let you know if the 174 zip with the 166 kernel worked. I guess if I have a Nookmanager backup not much can go wrong.
EDIT: I tried to reinstall the package with the replaced uImage into my father's nook. (1.2.1 with Nookmanager and kernel 166) and it said "installation aborted", when I switch the signature check on it says signature check failed or the like.
on my hard drive.
I have no idea why it got removed from the first post. Maybe the link is posted somewhere else.
Anyway, download it from the attachment.