First you need root.. Of course.. But once you've got root.. are we doomed to stock? Nope. Go to playstore and grab 'Rom Installer'.. link... https://play.google.com/store/apps/details?id=com.jrummy.apps.rom.installer Open the app and if your running the old 720 you can skipe this step and move to step #2. Step #1.(L720t only) open rom installer app. Go to setting of app. and choose user defined device. Change name from 'jflterefreshspr' to 'jfltespr' Step #2. Select a custom Recovery such as TWRP/CWM.. Step #3. After flashing (I CAN'T PRESS YOU ENOUGH TO STOP HERE AND MAKE A BACKUP OF ALL PARTITIONS IN RECOVERY!) . Reopen app.. and select ROM of choice.. Step #4. Reboot, wipe cache and whatnot...and flash. All is automated at this point. After it finishes downloading.. it should ask if you want to flash. Hit yes. Done.