[Barnes & Noble Nook Tablet] digixmax:
Installing CM10.x Internally on Nook Tablet

[Caveat emptor: adopt/follow this guide at your own risk].

The following is the process using SD-based recovery to install CM10.x internally (i.e., on emmc) on a Nook Tablet running stock ROM. (To flash CM11 see http://xdaforums.com/showthread.php?t=2692403).

Using a disk partition tool (such as MiniTool Partition Wizard Home Edition) create on SD card a Primary FAT32 partition, and set the partition ID type for the partition to 0x0C FAT32 LBA and set its Active flag. Once this is done, the partition should appear as a (read/write accessible) drive under Windows

Obtain and copy to the SD card the following files:

first

MLO, then next u-boot.bin, flashing_boot.img and recovery.img in succulent_boot.zip obtained from https://www.mediafire.com/folder/xjwc1a482a6ll/Nook_Tablet

the flashable_CWM_6.0.2.x_chrmhoffmann.zip zip file from https://www.mediafire.com/folder/xjwc1a482a6ll/Nook_Tablet which contains the CWM recovery provided by Chris Hoffmann at http://goo.im/devs/chrmhoffmann/cm10.1 (linked in his first post of the XDA Official CM10.2 thread http://xdaforums.com/showthread.php?t=2388520).

the zip file of CM10.x ROM build of your choice – e.g., from http://download.cyanogenmod.org/?device=acclaim.

the zip file of the Gapps package (corresponding to the particular chosen CM10.x release) from http://wiki.cyanogenmod.org/w/Google_Apps

Put the SD card into the NT, and boot from its power off by inserting a powered USB cable. Press and hold the N button as soon as CyanoBoot comes up to get the boot menu to display.

Select SDC Recovery.

[

Optional step but highly recommended

] Select Backup to backup your NT current ROM config (/boot, /recovery, /system, and /data).

Select Wipe data & factory reset.

Select install zip from SD card and install flashable CWM recovery zip file.

Select install zip from SD card and install CM10.x zip file.

Select install zip from SD card and install Gapps zip file.

Remove SD card and select reboot.

Once the NT boots up, set up the wifi connectivity and your google account info. If you had previously used Google backup service on your NT your apps will be auto-downloaded (but their settings will not be auto-restored).

Notes

If the Nook fails to boot off SD -- the two most common symptoms of failed SD boot and their likely causes are:

The NT boots straight to stock -- most likely the boot partition's type and/or flag are not correctly set, or the NT cannot find the MLO in the boot partition (make sure that MLO is the very first file to be copied to the freshly made /boot partition).

The NT screen stays dark for seemingly a long time then eventually boots to stock -- most likely the MLO or u-boot.bin are corrupted. When in doubt, compare the size of the two copies of the files in bytes.

Installing CM ROM and Gapps will override your NT's current boot, recovery, ROM, and Apps, so make sure that you backup all this stuff using recovery backup function, for easy in reverting to previous ROM if desired. See my post at http://xdaforums.com/showthread.php?p=48612997#post48612997 for more "Info and Tips for Mitigating Risks in Rooting and Flashing Custom-ROM".

Also, I would advise against using any other functions of the recovery without first carefully researching to understand what they really do.

Skip steps 2(b) and 7 if using Succulent's CM10.x ROM (as his ROM zip file already contains emmc recovery.img).

The "boot/reboot to black screen" is a known and AFAIK unresolved issue for 10.1 and 10.2.x. Its frequency of occurrence varies with users (30-40% in my case), and some users have reported (just as you seemed to have also experienced) that given more elapsed time the boot/reboot would eventually complete. See http://xdaforums.com/showthread.php?t=2388520&highlight=black+screen&page=23 for brief discussions of this issue as well as the "sputtering boot animation issue".

My thanks to all the developers who collective work created the wonderful CM ROM for the NT as well as the tools and info I made use of to install it.