Worried that an OTA update will put a crimp in your Nook Tablet modding activities? Then you may want to follow the lead of xda-developers member Indirect, who has managed to tweak the tablet to block all OTA updates and kindly provided the means for you to do the same. That involves installing a few files on your device (another method is also available that involve tweaking some files), but Indirect says that the process "holds no risk," and that it won't prevent you from buying books from Barnes & Noble. Complete details can be found at the source link below.
XDA dev provides means to block Nook Tablet OTA updates
Donald Melanson|@donmelanson|December 25, 2011 9:05 PM