Are you using Ninja 3 ? Is your Phone rooted ? You should already be having recovery . You can go into recovery by pressing Volume + button with Power Button on startup. Incase you need to install recovery follow this link : http://androidatyourtips.blogspot.in/2013/01/how-to-manually-install-recovery.html Incase you just need the HOLO launcher download or Ninja 3 stock launcher http://www.mediafire.com/?88cv8i0ft21y79n
Hopefully you have rooted the phone and have Android tools installed. In android cmd terminal give these commands after downloading the launcher and placing it in the android bin folder.
adb root
adb remount
adb push MLabsLauncher.apk /system/apps
adb reboot
Hopefully this will solve your problem.
