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

FWIW, here the process I used to install CM11 internally (on emmc*) on my HD+:
  1. 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.
  2. Use an archive file manager such as 7-zip and extract the .img file from verygreen’s emmc-cwm-early3.1.img.gz (
  3. Use the archive file manager to extract the files from the .img file and copy them to the SD card: first MLO, then next u-boot.bin, uImage, kernel, ramdisk.cwm.
  4. Copy to the SD card:
  5. Put the SD card into the HD+, and boot from its power-off state.
  6. [Optional step but highly recommended] Select Backup to backup your HD+ current ROM config (/boot, /recovery, /system, and /data).
  7. Select Wipe data & factory reset.
  8. Select install zip from SD card and install flashable CWM recovery zip file.
  9. Select install zip from SD card and install CM11 zip file.
  10. Select install zip from SD card and install Gapps zip file.
  11. Remove SD card and select reboot.

Once the HD+ boots up, set up the wifi connectivity and your google account info.

If the Nook fails to boot off SD -- the two most common symptoms of failed SD boot and their likely causes are:
  1. The HD+ boots straight to stock -- most likely the boot partition's type and/or flag are not correctly set, or the HD+ 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).

    If the HD+ consistently boots straight to stock in spite of a valid /boot partition and boot files, it's possible that the tablet is one of those HD+ units that have difficulty booting of SD cards, see for more info and potential remedies.
  2. The HD+ 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.

HOW-TO Guides for Installing CyanogenMod on Nook HD+
Installing CM11 Internally on Nook HD+ (this guide)
Building a CM11 SD card with Customized Partition Sizing for HD+
Updating HD+ Internal EMMC to CM11 from CM10.x
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