A PA34 PLT BECAME DISTRACTED BY NEW ACFT EQUIP AND LOST SITUATIONAL AWARENESS DURING TAXI AT ADS.

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MY TAXI CLRNC WAS TAXI TO FBO; HOLD SHORT OF TXWY T FOR ACFT IN TOW. I ACCEPTED THE TAXI CLRNC; TAXIED OUT OF THE TIE-DOWN AREA; AND PROCEEDED N ON TXWY A TO NOTING THE ACFT IN TOW. DURING MY SLOW TAXI; I BEGAN TO PREOCCUPY MYSELF WITH OTHER ITEMS; SUCH AS A NEW FUEL FLOW METER. THIS ACFT WAS A RENTAL; WHICH I HAD SUCCESSFULLY COMPLETED A CHK OUT IN; BUT WAS UNFAMILIAR WITH THE OP OF THIS METER. THIS IS WHERE THINGS STARTED TO BREAK DOWN; WITH THE FAULT COMPLETELY ON MY SHOULDERS. WHILE THERE WAS NO ACCIDENT OR APPARENT INCIDENT; THE PREOCCUPATION WITH THE FUEL-FLOW METER DIVERTED MY ATTN WITH THE AIRPLANE IN TOW. WHEN I FULLY REORIENTED MYSELF I WAS PAST TXWY T; AND STILL HEADING N. I CONTINUED MY TAXI TO FBO AS NORMAL. EITHER I HAD SUBCONSCIOUSLY SEEN THE ACFT IN TOW TURN OFF; WHICH IS WHY I KEPT TAXIING OR MAYBE I WAS EXTREMELY LUCKY THAT A TAXI COLLISION DID NOT OCCUR TO JOLT MY SENSES BACK TO WHERE THEY BELONGED. EVEN THOUGH I HAVE TIME IN THE ACFT; THE UNFAMILIARITY OF THE FUEL FLOW COMPUTER AND THE DIVERSION OF ATTN MADE ME AWARE OF MY COMPLACENCY. THEREFORE; I HAVE MADE IT A PERSONAL CHKLIST TO CONCENTRATE ONLY ON THE TASK AT HAND AND DO THINGS THOROUGHLY AND COMPLETELY.