Video Guide:

Useful links:
–XDA Thread

Short written guide (Mainly by Faryaab):
-Copy Google Apps and ROM to your internal SD Card
-Enter Recovery
-Do a Wipe/Factory Reset
-Wipe cache & Dalvik
-Flash Android 4.1.1 JB ROM
-Flash Google Apps
-Reboot your device!
-Enjoy

Note:
When flashing a new build, when already on this rom, such as going from Build 2 to Build 3 – there is no need to wipe.
Simply install the ROM, and after it has finished, don’t forget to flash GAAPS!

Pictures:
(Pictures from JB 4.1.1 Build 2, with the updated Google Now)

 

Google Now, video demonstration:
(Now fully working, after build 2 – which is not shown in the video)

Hope you enjoyed my guide!
–TotallydubbedHD