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