If you're rooted, it means KNOX doesn't matter anymore, just flash custom recovery(if not already), L5 bootloader/modem(downloadable from Wanam's site) and L5 custom rom. You might want to backup you data and wipe your phone.

When you flash root did you flash custom recovery? because most custom rom has to be flashed via custom recovery. The easy way to do this is to flash recovery via flashify App since your phone is rooted:
http://forum.xda-developers.com/note-4/dev...-n910c-t2977933
*EDIT: URL FIXED, you can also manually download CWM/TWRP custom recovery and flash it via odin btw.

Once that is done you may download and flash any custom rom by booting into custom recovery.

You need lollipop's bootloader and modems if you have not flashed stock lollipop rom, they can be downloaded here and flashed via odin:
http://wanamlite.com/2015/02/13/wanamlite-xxu1bob4-v2-0/

When this is done you can download and flash any Lollipop custom roms you like.

No problem, glad to help. How is Sweet Rom? I am still hesitating to root my phone due to KNOX warranty issue, and Lollipop's Waze issue because I use that app very often.

However, I think I will root very soon, I downloaded Dr Ketan's, Sweet Rom, and Wanam's rom just to see which one I will like best, base on their descriptions I think I will go for Dr Ketan's mostly. Hope you enjoy your Lollipop Note 4, can you please do some testing on Waze and see if you have the mentioned issue as well?

Thanks for the quick review, seems very buggy, did you wipe your phone after/before updating? Anyway, Waze is the main issue for me here, have to hold back a bit until it is fixed.