I encountered a small problem during installation, don't know if it was intended to be like this.
After upgrading BL and CP modems, booted into system, however I could not log onto the phone, as the old PIN code that I had before was no longer working. Just wanted to check if the BL and CP flash was successful, however I just continued booting into recovery and installing the ROM, which was luckily successful and I really like the ROM.
I don't know, most likely turning off the unlock PIN would help to log onto the phone after upgrading BL and CP. Or maybe it was because I was switching from Android 4.4.2 and something went wrong regarding that.