BEECH QUEEN AIR 65 CARGO PLT INADVERTENTLY BECAME DISORIENTED AND TAXIED PAST THE RWY HOLD SHORT LINES. HE DID A 180 DEG TURN AND RECROSSED BACK OVER THE HOLD SHORT LINES. TWR CTLR DID NOT SAY ANYTHING ABOUT HIS MISTAKE.

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ON THE MORNING OF JAN/THU/02; I WAS INVOLVED IN A RWY INCURSION EVENT AT MSP. I HAD BEGUN TAXIING AND RECEIVED AN OUT OF THE ORDINARY TAXI CLRNC. MY INSTRUCTIONS WERE TO TAXI DOWN RWY 4 AND HOLD SHORT OF RWY 30L; MY DEST BEING RWY 30R FULL LENGTH. I WAS ON GND CTL FREQ 121.9. AS I TAXIED; I OVERHEARD GND CTL GIVING OTHER ACFT ON THE FIELD THE FREQ 133.57; A FREQ I BELIEVED WAS USED IN CASE OF A STUCK MIKE ON ANOTHER GND FREQ; N 121.8. I RECEIVED CLRNC TO CROSS RWY 30L AND ANTICIPATED BEING SWITCHED TO EITHER 121.8 OR 133.57. AS I TAXIED; I HEARD SOME ACFT AND EITHER OTHER ACFT OR TWR XMITTING AT THE SAME TIME. FINALLY; GND ASKED EVERYONE ON 121.9 TO ALLOW AIRPLANES TO RESPOND. I DID NOT HEAR GND ASK ME TO SWITCH FREQ AFTER I CROSSED AND AS I BEGAN TO APCH RWY 30R; I BEGAN TO WONDER IF I HAD BEEN ONE OF THE AIRPLANES THAT HADN'T RECEIVED A FREQ CHANGE DUE TO SIMULTANEOUS XMISSIONS. FINALLY; I WAS GIVEN A CHANGE AND TOLD TO GO TO 121.8. AS I SWITCHED; I HEARD GND IMMEDIATELY SPEAKING TO ME. I BELIEVE THEY HAD BEEN CALLING ME BEFORE THE CHANGE. I WAS THEN TOLD TO TAXI TO RWY 30R BY FOLLOWING ACFT Y; WHICH WAS AT THE TIME BEHIND ME ON A DIFFERENT TXWY. I BEGAN TO LOOK FOR TXWY Q. I PASSED TXWY P AND ANTICIPATED REACHING TXWY Q. NORMALLY; ON A REGULAR BASIS; I LAND ON RWY 30R AND AM TOLD TO TAXI ON EITHER TXWY P OR TXWY Q. TXWY P IS N OF TXWY Q. I TAXIED PAST TXWY P ON THIS MORNING EXPECTING THE NEXT TURNOFF TO BE TXWY Q. I HADN'T THOUGHT ABOUT THE FACT THAT I WAS HDG N; INSTEAD OF S AND THAT MEANT THE TXWYS WOULD HAVE BEEN TXWY Q FOLLOWED BY TXWY P. I PASSED TXWY P AND FOUND MYSELF PAST THE HOLD SHORT LINE. I QUICKLY EXECUTED A 180 DEG TURN AND TAXIED BACK ACROSS THE HOLD SHORT LINE. EVERYTHING THAT OCCURRED AFTER THIS WAS ROUTINE AND WITHOUT SIGNIFICANCE. THE PROB AROSE BECAUSE I WAS PAYING TOO MUCH ATTN TO WHICH FREQ I WOULD BE GIVEN AND WHY I HADN'T BEEN SWITCHED. I WAS NOT PAYING AS MUCH ATTN TO SITUATIONAL AWARENESS AS I SHOULD HAVE BEEN. ONE CONTRIBUTING FACTOR MAY HAVE BEEN THE EXCESSIVE XMISSIONS OVER 121.9; WHICH DIDN'T ALLOW ME TO HEAR A FREQ CHANGE WHEN I ANTICIPATED. ANOTHER CONTRIBUTING FACTOR MAY HAVE BEEN THE TIME OF DAY. EARLY IN THE MORNING; TXWY LIGHTS ARE NOT AS EASILY VISIBLE AS THEY ARE AT NIGHT. THE TXWYS THEMSELVES ARE NOT AS VISIBLE AS THEY ARE DURING THE DAY. I DISCOVERED THE PROB BY SEEING A SLIGHTLY OFFSET ROW OF WHITE LIGHTS; WHICH MEANT I WAS ALMOST ON THE RWY. THE CORRECTIVE ACTIONS I WILL TAKE IN THE FUTURE WILL BE THE FOLLOWING: 1) I WILL PAY MORE ATTN TO SITUATIONAL AWARENESS AND NOT ALLOW 1 MINOR; OUT OF THE ORDINARY OCCURRENCE AFFECT A SAFETY ISSUE. 2) I WILL; IN LIEU OF BEING GIVEN AN ACTUAL CLRNC WITH A NAMED TXWY; ASK FOR A CLARIFICATION IF THERE IS ANY QUESTION. STOPPING THE ACFT AT THIS POINT COULD ALSO BE DONE; AS LONG AS IT DOESN'T OCCUR ON AN ACTIVE RWY. 3) I WILL QUERY ATC IF I AM NOT GIVEN A FREQ CHANGE WHEN ANTICIPATED IF THE SIT AFFECTS SAFETY. THE HUMAN PERFORMANCE CONSIDERATIONS I MADE IN THE EVENT WERE FAULTY. I DID NOT EXERCISE AS MUCH VIGILANCE AS I SHOULD HAVE. I KNOW GND OPS DURING NIGHT; SUNSET; AND SUNRISE DEMAND MORE OF THE PLT IN MANY ASPECTS. I DO NOT FEEL THERE WERE ANY OUTSIDE FACTORS AFFECTING MY JUDGEMENT AS THE HOP WAS ROUTINE AND I HAD GOTTEN ADEQUATE REST THE NIGHT BEFORE. AS A PIC; I WELCOME ANY AND ALL CRITIQUES TO THIS RPT; AS I MAY HAVE OVERLOOKED CERTAIN FACTORS. THANK YOU FOR YOUR ATTN TO THIS CORRESPONDENCE.