[Nook Color General] pastordl:
I have set up cloned Nook Colors for myself and others by copying the recovery files from the original setup SD Card to the SD Card of the Nook I want to clone to. I have done this for my two grand daughters and several husbands and wives. Saves a lot of time on set up and gives them one google account to deal with. When I started doing this with CM 7 I found the cloned Nooks listed the same Mac address in the WIFI settings. CM 10 does the same thing. This creates a problem if both nooks are trying to connect to the same router. I checked the MAC address file in /rom/devconf/macaddress which had the device's original Mac address. The problem was changing what the ROM was using in settings. Most everything I found were temporary fixes that had to be redone every time you rebooted, not acceptable. I finally found a forum under the Kindle fire that I was able to make work on the Nook with some changes.

Original credit goes to TheKid2 at: http://xdaforums.com/showthread.php?p=20730355

I found some easier ways, for me at least, to accomplish the desired results.

Edit: Got a better answer

See steven676 answer below for an even easier way.

I AM NOT LIABLE IF YOU MESS SOMETHING UP

PROCEED AT YOUR OWN RISK

Files you need:

Stock file manager set up with root access. Any File manager / explorer with root access will work.

A hex editor. I used Hex Editor available for free on Google play. Install the hex editor.

Go to System Settings, WIFI, Settings, advanced and copy down the listed MAC address ie 1a:2b:3c:4d:5e:6f

In File manager, go to settings, advanced, Access mode and change to root access mode. (change this back to safe mode afterwards to keep others from getting where they can mess things up)

Locate the original Mac Address in /rom/devconf/macaddress and write it down. The file will have12 characters 1a2b3c4d5e6f I write it down like this, 1a:2b:3c:4d:5e:6f, to help in copying it and will aid in the editing in hex.

Now navigate to Storage/SDcard1 in File manager, press the action icon, (8 dots in 2 columns of four dots), and select new folder, enter "Test" and press "OK"

Now navigate to root, (press the / in the address bar) and go to /data/misc/wifi/wl1271-nvs.bin, Press and hold on file, in Actions, select create copy, (a backup just in case)

check box next to "wl1271-nvs.bin"

navigate to sdcard/test, press the action Icon and copy selection here

Now press and hold on the file, in Action select, "Open with" and select, "hex editor"

now open the wl1271-nvs.bin that is in the sdcard with hexeditor, Turn nook on side for landscape mode.

edit the first line, Starting with the fourth digit pair, Note that the Mac Address is listed in the file in reverse.

for the mac address 11:22:33:44:55:66

00000000: 01 6d 54

66

55

44

33

01 71 54

22

11

00 00

Nook CM10 = 00000000: 01 6d 54

6a

56

03

1a

01 71 54

67

58

Mac Address = 58:67:1a:03:56:6a

Select menu, "save file", return Icon at bottom of screen.

now in File manager go to go to sdcard/test, check box next to "wl1271-nvs.bin"

Now navigate to root, (press the / in the address bar)

Go to /data/misc/wifi/,

select wl1271-nvs.bin from the sdcard, navigate to into data/misc/wifi, press the action Icon and copy selection here

long press on the file and in Actions, properties, permissions make sure all the R and W boxes are checked., press "OK"

now reboot

In System Setting> wifi >settings> menu>advanced and double check your new mac address

Congratulations.