C172 TAXING FOR DEP AT GGG EXPERIENCED RWY INCURSION.

Narrative

I WAS GIVEN CLRNC TO RWY 17 VIA TXWY B. AS I WAS TAXIING; I LOOKED AT A SMALL PHOTO COPY OF THE ARPT DIAGRAM I HAD ON MY KNEE BOARD. THE COPY IS POOR QUALITY AND TXWY B DID NOT SEEM TO GO TO RWY 17. I BECAME CONFUSED AND TURNED L ON TXWY N AND PROCEEDED ABOUT 300 FT TOWARD RWY 17. I WAS TOLD BY GND CTL TO STOP; HOLD SHORT! I STOPPED IMMEDIATELY AND REPLIED 'HOLD SHORT.' SOMEONE ELSE ON GND FREQ REPLIED RWY INCURSION. (I HAD PASSED THE HOLD SHORT LINE.) I WAS TOLD TO GO TO TWR FREQ FOR TKOF. I WAS CONFUSED ABOUT JUST WHAT TO DO; SO I CALLED BACK AND ASKED FOR A REPEAT OF INSTRUCTIONS. A DIFFERENT CTLR ADVISED I HAD 2000 FT FOR TKOF AT MY LOCATION. I ASKED FOR BACK-TAXI CLRNC AND PROGRESSIVE TAXI HELP BACK TO TXWY B AND RWY 17. I WAS CLRED TO BACK TAXI; BUT DID NOT GET PROGRESSIVE TAXI INSTRUCTIONS AND WENT PAST TXWY B ABOUT 20-30 FT. GND THEN SAID I PASSED MY TURN; SO I TURNED BACK TO TXWY B FOR RWY 17. I WILL GET A BETTER AND LARGER COPY OF THE ARPT DIAGRAM THAT CLRLY SHOWS THE TXWYS. I WAS AT FAULT. I SHOULD HAVE STOPPED AND ASKED WHEN I HAD DOUBT. THE WX WAS NOT GOOD AND THERE WERE NO OTHER ACFT TAKING OFF OR LNDG. I WAS SURPRISED THAT 2 CTLRS APPEARED TO BE WATCHING ME TURN ON TXWY N AND GET JUST ACROSS A HOLD SHORT LINE BEFORE SAYING STOP OR QUESTIONING ME OF MY INTENTIONS OR AT LEAST POINTING OUT I HAD MADE A WRONG TURN.