A little late to the party, but I just got an A2109 and hate the crapware on it. New to Android tabs and want to install your stock JP ROM with the crapware removed etc, and your battery meter mod looks good too. Currently updated to the stock 4.1.1 firmware.
As I under stand the process,
Step 1 is unlock the bootloader as per this post: [HowTo] Unlocking the Bootloader (Windows) and/or Anika200's [HowTo] A2109 Fastboot
Step 2 is install CWM Recovery as per this post: [HOW TO] Install ClockworkMod Recovery and Root
Step 3 is to flash the A2109A_MCL0201.zip ROM as per this current post.
The only thing I am not sure about is whether or not I need to follow the process in step 2 to root by flashing superuser after installing CWM, because it looks like root is included in your step 3 ROM?
Also, if the process fails for some reason, is there an easy way to flash the device back to the stock ROM?
Thanks for your assistance.