Any one with OBD II scanner can do the computerized tuning. But you need to know the default values for the car to be tuned up. Dont Expect the tuner to know the default value of different cars. Even the tuners dont know that there are different values of valve clearances for different cars. Most tuners adjust the same valve clearnace ranging from mehran to Civic.
BTW there is one on the Nullah road on Samanabad he is named Sohail efi electrician.