THe process is the same for all versions. The first thing is get ADB set up on your machine and seeing your Nook. See Leapinlar's Tips thread in general for ideas and process for that. Once that's done, make sure you have PATH set up to your adb folders, go the location where your apk file is located on your PC and open a command window. Type ADB Devices to make sure you device is seen (should see a device number). Then type ADB Install name.apk -- Done!
No rooting or other mod is necessary.