Go early morning around 9 at office.
1) Collect 2 forms from 1st floor and fill both by your self.
2) Inspect your vehicle from Inspector he will sign those papers.
3) Submit your forms along with CNIC copy and utility bill at window 1 of office. He will share with you registration number.
4) Collect number plates from other window as per your registration number.
All it take max 2 hours.
If you still have any confusion do let me know.