B737 DEP FROM ABQ CROSSED HOLD LINE WHILE CALCULATING DEP DATA.

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BREAKDOWN IN COM; BOTH IN THE COCKPIT AND WITH ABQ TWR; RESULTING IN POSSIBLE INCURSION ON RWY 21 AT TXWY E. AS WE APCHED RWY 21 ON TXWY E; TWR CLRED US ON THE RWY. WHEN I HEARD TWR GIVE THE CURRENT WINDS TO ANOTHER ACFT; I BECAME CONCERNED THAT THE WINDS MIGHT EXCEED THE RWY 21 TAILWIND LIMIT. I ASKED TWR TO REPEAT THE WINDS AND TOLD THEM WE NEEDED TO RECALCULATE OUR TKOF DATA AND THAT WE MIGHT NOT BE ABLE TO DEPART ON RWY 21. UPON HEARING THIS; THE FO IMMEDIATELY PICKED UP THE OPC AND BEGAN CALCULATING THE PERFORMANCE DATA WITH THE UPDATED WINDS. TWR ACKNOWLEDGED MY CALL AND TOLD US TO HOLD SHORT OF RWY 21. SHORTLY AFTER THAT; I INADVERTENTLY CROSSED THE RWY 21 HOLD SHORT LINE; WHICH I HAD MISTAKEN FOR AN INST HOLD LINE. WHEN WE REALIZED THAT WE WERE ON RWY 21; I IMMEDIATELY REQUESTED CLRNC ON THE RWY; WHICH TWR GRANTED. WE CHKED THE OPC AND DETERMINED THAT WE COULD MEET RWY 21 PERFORMANCE REQUIREMENTS FOR THE CURRENT CONDITIONS. WE THEN ENSURED THAT ALL CHKLISTS WERE COMPLETED AND MADE AN UNEVENTFUL TKOF AND DEP. AS FAR AS I CAN TELL; WE DID NOT CREATE A HAZARDOUS SIT OR CAUSE A LOSS OF ACFT SEPARATION. OTHER FACTS AND CIRCUMSTANCES: THIS WAS THE FINAL DAY OF A 4 DAY TRIP AND OUR FIRST DAY OPERATING WITH THE NEW FOM PROCS. I BELIEVE THAT WE WERE BOTH PREOCCUPIED AND DISTR WITH TRYING TO 'UNLEARN' THE PROCS WE HAD USED OVER THE PRECEDING 3 DAYS AND; AT THE SAME TIME; TRY TO CORRECTLY APPLY A NEW SET OF PROCS AND CHKLISTS. THIS PREOCCUPATION CONTRIBUTED TO MY INATTENTIVENESS IN MISTAKING A RWY HOLD SHORT LINE FOR AN INST HOLD LINE. ALSO; WITHOUT REALIZING IT; WE INCORRECTLY REVERTED BACK TO THE OLD PROCS. I ALLOWED THE FO TO TAKE HIMSELF OUT OF THE LOOP BY NOT CORRECTING HIM WHEN HE REACHED FOR THE OPC AS WE TAXIED TOWARD AN ACTIVE RWY. WE COULD HAVE AVOIDED THIS ENTIRE SIT HAD WE FOLLOWED THE NEW PROCS! I SHOULD HAVE KEPT THE FO 'IN THE LOOP' BY ALLOWING HIM (INSTEAD OF ME) TO TALK TO TWR. ALSO; I SHOULD HAVE TOLD THE FO NOT TO BEGIN CALCULATING NEW PERFORMANCE DATA UNTIL WE WERE COMPLETELY STOPPED (WITH PARKING BRAKE SET) SHORT OF THE RWY 21 HOLD SHORT LINE; OR AS DIRECTED BY TWR. I AM AMAZED AT HOW QUICKLY WE BOTH REVERTED BACK TO THE OLD PROCS DURING A BUSY TIME IN THE COCKPIT. SEVERAL LESSONS WERE LEARNED FROM THIS OCCURRENCE.