I have unlocked the booloader for my xperia arc s running ICS 4.0.4 and would like to flash a custom ROM. I would like to know if i need to root and flash same kernal ? and also need to install the CWM recovery ? or is is fine to flash custom ROM right away? please be specific with your answers !
Don't even try to install any custom ROM or kernel without first flashing ClockworkMod. Also, I would suggest CyanogenMod, but that may not be compatible with your device. Check here: http://wiki.cyanogenmod.org/w/Devices