All of these links direct you to the original XDA thread containing further information - root access, installation, support and many more. Except the app you wanted to install, you can also find some more apps. I will provide a simple general installation proccess for all Android devices:
- Downloaded an APK file? Try to install it as you normally do. If it doesn't work, push it to /system/app, change the permissions, wipe dalvik cache & reboot.
- Downloaded a ZIP file containing META-INF folder? Just flash it using your custom recovery.
Further information about the isntallation proccess can be found in the threads in the links.
- Google Experience Launcher
- Boot animation
- Play Games
- Quick Office
- Street View
- Google Now
Links might be mixed or broken - if so, drop me a line down to comments so I can fix the problem.