GLF5 CREW HAD AN UNSTABILIZED APCH ON THE ILS TO RWY 10R AT MRY.

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THE SIT OCCURRED WHILE BEING VECTORED TO THE ILS RWY 10R AT MRY. IN THE DSCNT; PASSING 15000 FT AND AGAIN AT 10000 FT; I THOUGHT TO MYSELF THAT I WAS HIGH. INSTEAD OF ASKING FOR A DELAYED VECTOR; I CONTINUED THE APCH. AFTER DSNDING THROUGH 10000 FT; I SEEMED TO GET SO FOCUSED ON GETTING DOWN THAT I LOST ALL PERSPECTIVE OF REALLY HOW CLOSE I WAS TO THE ARPT. I BROKE THROUGH THE CLOUD LAYER; BUT AT THAT POINT I WAS ALREADY PAST THE MISSED APCH POINT AND ABOUT 1000 FT PAST THE APCH END OF THE RWY. I THEN EXECUTED THE MISSED APCH AND CAME AROUND FOR ANOTHER APCH WITH AN UNEVENTFUL LNDG. SEVERAL TIMES; MY CO-PLT ASKED IF I WAS GOING TO GET DOWN; HE WAS UNCOMFORTABLE WITH THE APCH. I JUST RESPONDED; 'WE WILL MAKE IT.' MY PERSISTENCE QUESTIONED HIS JUDGEMENT. SEVERAL FACTORS CONTRIBUTED TO THIS INCIDENT: 1) MY APCH BRIEF WAS INADEQUATE; I DID NOT DISCUSS ALTS; AT MY FAF; MINIMUMS OR THE MISSED APCH PROCS. 2) MY FMS WAS SHOWING THE COURSE TO THE IAF THEN INBOUND; WHEN IN FACT ATC HAD VECTORED US INSIDE THE IAF. THEREFORE MY MILEAGE TO THE ARPT WAS INCORRECT. I DON'T KNOW WHY I DIDN'T USE THE DME. 3) I TOTALLY DISREGARDED MY CO-PLT'S APPREHENSION AND HIS QUERY OF OUR ALT. I WAS SO FIXATED ON DSNDING THE ACFT THAT I JUST MUMBLED A STANDARD RESPONSE 'WE'LL MAKE IT.' I WAS FULLY CONFIGURED AND ON BOTH SPD AND LOC BUT NOT ON GLIDE. I SHOULD HAVE BRIEFED THE APCH MORE THOROUGHLY AND DISCUSSED THE CALLOUTS IN DETAIL. I DID NOT USE ALL THE INFO AVAILABLE TO ME REGARDING MY POS; ESPECIALLY MY DME. THE MOST IMPORTANT FACTOR THAT I DISREGARDED WAS THE LACK OF AGREEMENT BTWN THE TWO OF US; WHICH SHOULD ALWAYS CALL FOR A MISSED APCH; OR A HOLD; MUTUAL CONCLUSION; BUT NEVER TO CONTINUE.