Unlocked the bootloader from Sony's site
Downloaded the SDK
Flashboot flash boot boot.IMG
And installed cm.zip from the sdcard.
It worked, in fact, I am typing this from my newly ROM'ed xperia.
So, the question is , if I want to install another ROM now, say CM11 or even a complete different one from xda , what is the process?
Do I just copy the new zip, boot into recovery, and wipe wipe install?
Or do I need to reflash the new boot.IMG from the new ROM every time?