Custom ROM Installation Help

[AC Question]

Can anyone tell me how to install a custom ROM(Cyanogen Mod) from unlocking bootloader to installing the ROM?(LG L90 Dual D410, tried installing 2 times before, on the first, my phone went on bootloop, and on the second, I sort of hard-bricked my phone, so that's why I'm asking)

 

[B. Diddy]

Welcome to Android Central! Moved thread to the L90 forum. You may also want to check over at XDA-developers.com: LG Optimus L90