Official CWM a k a clock work mod recovery is now available for all models of Note Edge that includes N915S, N9150, N915F, N915G, N915P and N915T. Clockwork mod allows you to do all sorts of amazing mods on your Android phone including the ability to flash and install custom firmwares.
To flash it, download the appropriate version from below and flash using ODIN on your computer. Browse for the file in ODIN and put the phone in download mode. You can do this by pressing volume down + power button together for few seconds until the screen goes black and device restarts.
It shall be noted that installing CWM recovery on your Samsung Galaxy Note Edge voids the warranty.