B767-300 CREW FORGOT TO LOWER THE LNDG GEAR OR EXTEND LNDG FLAPS UNTIL THE GPWS WARNING SOUNDED.

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WE WERE CLRED FOR THE ILS AND THE ACFT CONFIGN WAS FLAPS 15 DEGS; GEAR UP. THE AIRSPD WAS 170 KTS AND OUR LOCATION WAS OUTSIDE THE LOM; ON GS AND ON COURSE. I WAS THE PF. AS WE NEARED THE LOM WE HAD A VISUAL ON THE RWY. I DISCONNECTED THE AUTOPLT AND AUTOTHROTTLES AND WAS FLYING MANUALLY. WE WERE ABOUT 3 MI BEHIND ANOTHER ACFT AND #2 FOR LNDG. THE R THROTTLE WAS 'STIFFER' THAN NORMAL; MAKING SYMMETRICAL THRUST APPLICATIONS TROUBLESOME. AS WE APCHED THE LOM; WE CONTACTED TWR AND WERE GIVEN LNDG CLRNC. MY ATTN ON THE ACFT AHEAD; INST XCHK AND THE THROTTLE DIFFICULTY COMPLETELY ABSORBED MY FOCUS. SO MUCH SO; THAT I MISSED THE 1000 FT AGL CALL BY THE FO OR IF I HEARD IF; MY BRAIN DIDN'T REGISTER THE INFO. IT WASN'T UNTIL THE GPWS VOCAL ANNUNCIATION OF 'TOO LOW; GEAR' SOUNDED THAT I REALIZED THE ACFT WASN'T CONFIGURED FOR LNDG. THE GEAR WAS EXTENDED; AND THEN FLAPS WERE EXTENDED TO LNDG POS IN NORMAL SEQUENCE. THE LNDG WAS MADE WITHOUT FURTHER INCIDENCE. BESIDES THE EMBARRASSMENT OF MAKING A 'STUDENT PLT' ERROR; I FELT THE DREAD OF REALIZATION OF 'WHAT MIGHT HAVE BEEN;' HAD THE GPWS NOT FUNCTIONED! PERHAPS THE EARLY WAKEUP (XA00 AM); THE END OF A 4-DAY TRIP; THE MID-AFTERNOON SLUMP OR JUST PLAIN 'GET-HOME-ITIS' OR ALL OF THESE TOGETHER IN ADDITION TO MY OWN COMPLACENCY; ADDED UP TO A VERY DUMB MISTAKE WITH POSSIBLY VERY SERIOUS CONSEQUENCES.