Download zip file (rom) and transfer that to SDcard
- Turn on debugging on your phone, turn off quick boot, turn off phone (some folks remove battery now:))
- Press vol. up and power button together for at least 10 seconds.
- You are in CWM now (probably)
- Wipe data/factory reset, wipe cache partition
- Mounts and storage: Format System, Cache, Data. Go back
- Advanced: Wipe Dalvik cache, Reboot recovery
- Install zip from SDcard -> choose zip -> your rom (zip)
- Reboot to system
Leave your phone now for 5 minutes, let it take a breath.