Originally Posted by burhanahmed92
after all these steo should i restart
You are just modifying the current ROM, Not making the ROM.
If you over right with other ROM while flashing you will loose all the modified data.(like making a Facebook as an System App)
After completion I suggest take a backup of your device.
Edit: If you are getting error, then Move that Facebook file to your Memory Card. After that uninstall Facebook, make sure that FACEBOOK FILE IS NOT ANYWHERE IN YOUR DEVICE EXCEPT YOUR MEMORY CARD. If you find there exist any then Delete that.
Now you are clean, Move that FACEBOOK file from MEMORY CARD to SYSTEM>APP and move there.
After file gets moved, just click on it and choose INSTALL.