Firstly this is not Jelly Bean 4.1. I am running ICS 4.0.3, but have found a few mods in the form of ZIP and APK files. Have a look at the vid and if you like what you see then follow these instructions on how to install them... enjoy!
I have uploaded the boot animation, font, wallpapers, live wallpaper, animations and keyboard to my RS account.
Here are the download links:
Live wallpaper APK
JB font ZIP
The APK's are simple to install. Just find where you have saved them to (if you clicked the download links using your note then they will be under 'downloads' folder.
The zip files are slightly more difficult.
Bootanimation.zip needs to be placed in 'System/Media', (need root and a root explorer to navigate to your root directory ( :/ )
Fonts.zip and animations.zip need to be flashed using CWM recovery.
Install zip from SD card...
Easy hey?? Any questions let me know...
Link for themes to install (XDA)