Be care full I am not responsible for anything happen to your device whether good or bad.
System partition requirement is around 800MB, if you don't have don't go ahead
put zip file in sdcard and install from recovery.
Take backup first
1. Download ROM from above link.
2. Put it in your SDCARD.
3. Reboot into Recovery.
4. Do factory reset(format data and catch partition).
5. Install Downloaded file.
7. Wait some time.. first boot takes time(3 to 5 minutes).
Waiting for someone report..