B737-700 CREW WAS REQUIRED TO MANUALLY BUILD THE FMC APCH AT GUATEMALA CITY; MGGT.

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GUA APCHS. I WOULD LIKE TO EXPRESS MY CONCERN ABOUT THE WAY WE FLY APCHS INTO GUA. SINCE I CHKED OUT TO GUA SEVERAL MONTHS AGO; I'VE HAD THE OPPORTUNITY TO FLY WITH QUITE A FEW DIFFERENT CAPTS. VIRTUALLY ALL OF THEM HAD A DIFFERENT TECHNIQUE ON HOW TO BUILD THE APCH TO RWY 1. I THINK THIS IS DANGEROUS. A STANDARD APCH OUGHT TO BE BUILT INTO THE DATABASE; OR WE SHOULD BE GIVEN A STANDARD WAY OF CONSTRUCTING THE APCH. ON SEVERAL OCCASIONS WE HAVE OVERSHOT THE 7 DME LIMIT DUE TO WINDS AND WHILE IT WAS DAY VFR AND THERE WAS NO DANGER; A CONSERVATIVE METHOD OF CONSTRUCTING THE APCH OUGHT TO BE THE NORM. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CREW FLIES THE B737-700 ACFT. THE ACR HAS THE ILS DME 1; RWY 1 APCH IN THE DATABASE. THE CREWS PREFER THE ILS DME 2; RWY 1 APCH BECAUSE IT IS FURTHER FROM THE HIGH TERRAIN SSE OF THE ARPT. AFTER RECEIVING THE PLT'S RPT; THE ACR AGREED WITH HIM. THE REQUESTED APCH IS BEING ADDED TO THE FMC DATABASE AND THE UNUSED APCH IS BEING REMOVED.