A B737 FLC TAXIES OVER THE HOLD SHORT LINE FOR RWY 32R AT ORD; IL.

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WE WERE ASSIGNED RWY 32R FOR DEP; WHICH WAS A RELATIVELY SHORT TAXI FROM THE CONCOURSE VIA TXWY B. CREW WAS PREOCCUPIED WITH COMPLETION OF TAXI; DELAYED ENG START; AND BEFORE TKOF CHKLISTS IN A COMPRESSED TIME SPAN. NO OTHER ACFT WERE AHEAD OF US IN SEQUENCE FOR TKOF. TXWY B DOES NOT CROSS RWY 32R; BUT XMITS THE LEAD-IN AREA FOR THE RWY. WHILE PERFORMING 'CHALLENGE AND RESPONSE CHKLIST ITEMS; WE MISSED THE HOLD POINT TO THIS LEAD-IN AREA. I DO NOT KNOW THAT AN ACTUAL RWY INCURSION OCCURRED; AS THE THRESHOLD FOR RWY 32R WAS FURTHER NW OF OUR POS; BUT WE DID ENTER THE LEAD-IN AREA; AND THANKFULLY THERE WAS NO ACFT ON APCH TO THE RWY. WE IMMEDIATELY SAW THAT WE HAD PROCEEDED TOO FAR; AND EXPEDITED THROUGH THE LEAD-IN AREA; AND THANKFULLY THERE WAS NO ACFT ON APCH TO THE RWY. WE IMMEDIATELY SAW THAT WE HAD PROCEEDED TOO FAR; AND EXPEDITED THROUGH THE LEAD-IN AREA. AT THAT POINT GND CTL NOTED OUR POS; AND INSTRUCTED US TO TURN BACK TO RWY 32R VIA TXWY A AND CLRED US INTO POS AND HOLD. CLRLY; OUR RUSH TO COMPLETE CHKLIST ITEMS WAS THE PRIMARY CAUSE OF OUR FAILURE TO SEE AND STOP AT THE HOLD POINT. A RED LIGHTED RWY SIGN EXISTS AT THIS POINT; BUT THERE ARE NO FLASHING ALERT LIGHTS THAT MAY HAVE HELPED COMMAND OUR ATTN. THIS WOULD HELP; AS THE AREA IS RATHER CONGESTED WITH THE CONVERGENCE OF SEVERAL TXWYS AND THE APCH ENDS OF RWYS 27R AND 32R IN CLOSE PROX. THE CAPT NOTED THAT HE SAW THE RED LIGHTED SIGN FOR RWY 27R; AND WAS HEADED FOR THAT AREA WITH THE MISTAKEN ASSUMPTION THAT IT WAS THE HOLD POINT FOR OUR ASSIGNED RWY 32R. THE LOW LIGHT CONDITIONS OF THE DAWN HR ALSO CONTRIBUTED TO THE CONFUSION. THE EASIEST; MOST LOGICAL SOLUTION TO THIS POTENTIAL HAZARDOUS SIT IS TO SLOW DOWN AND NOT FALL INTO THE 'GOTTA GO; GOTTA GET THERE' TRAP. WE HAD ANTICIPATED RWY 32L AT INTXN T10 FOR THE DEP RWY AS ANNOUNCED IN THE ATIS MESSAGE; WHICH WOULD HAVE PROVIDED MUCH MORE TAXI TIME AND PREPARATION; SO WE FELL INTO THE 'HURRY UP' MODE WHEN ASSIGNED RWY 32R. THE LESSON FOR FO IS: KEEP AN EYE ON WHERE THE CAPT IS TAXIING; AND BACK HIM UP!