AN MD11 CREW; TAXIING FOR TKOF AT ORD; MISSED THEIR ASSIGNED TXWY ENDING UP ON AN ACTIVE RWY WITHOUT A CLRNC.

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ON CHKING IN WITH GND COMING OUT OF THE RAMP; OUR RWY GOT CHANGED FROM RWY 32L (RIGHT NEAR THE RAMP) TO RWY 27L. AS WE TAXIED TO RWY 27L; I HAD TO ENTER THE NEW RWY DATA INTO OUR PERFORMANCE COMPUTER AND ENTER THE DATA INTO THE FMS. WE ALSO HAD TO CROSS RWY 27L AND RWY 32L; SO THIS DELAYED CONFIGURING THE ACFT. I HAD MY TAXI CHART (ARPT DIAGRAM) OUT AND MONITORED OUR POS AS WE GOT ON TXWY M AND CROSSED RWY 32L. DURING THE TAXI; THE CAPT (A LINE CHK AIRMAN) REQUESTED MORE THAN ONCE THAT I EXTINGUISH MY MAP LIGHT AS IT WAS DISTRACTING TO HIM. ONCE ON TXWY 'M;' I LEFT THE LIGHT OFF AND SIMPLY WATCHED FOR THE TXWY LEADING TO RWY 27L. I HAD NOT NOTED ITS NAME; SO I WAS TRYING TO WATCH FOR THE TXWY LEADING FOR RWY 27L. RATHER THAN A SPECIFIC NAME. AS IT WAS; WE MISSED TXWY 'M7' (ACCESS TO RWY 27L) AND PASSED TXWY 'Q' AND TAXIED ON RWY 22L; THEN MADE ANOTHER R TO LINE UP WITH RWY 27L. AS SUCH; WE TAXIED ON RWY 22L WITHOUT SPECIFIC CLRNC TO DO SO AND ON PAVEMENT NOT MARKED OR DEPICTED AS A TXWY OR RWY (THE EXTENSION OF RWY 27L IS PAVED TO RWY 22L). WE CHKED AND VERBALIZED THAT RWY 22L WAS CLR BOTH WAYS; SO NO TFC CONFLICT OCCURRED. LESSON LEARNED: 1) LINE CHK AIRMAN CAN MAKE MISTAKES. I DIDN'T FEEL COMFORTABLE WHILE TAXIING ON TXWY M APCHING RWY 22L AND ALLOWED HIM TO CONTINUE WHEN HE SAID THAT HE KNEW WHERE HE WAS WHEN I REACHED FOR MY MAP LIGHT. 2) I WAS NOT EMPHATIC ENOUGH TO THE CAPT IN STATING MY CONCERNS AND FAILED TO ALLAY MY FEELINGS BY CHKING THE ARPT DIAGRAM. 3) I ALLOWED HIM TO TAXI ON PAVEMENT THAT HAD NO MARKINGS OR LIGHTING AS A TXWY COMING OFF RWY 22L AND LINING UP ON RWY 27L. I FELT THAT I HAD TOLD HIM THAT IT WASN'T A TXWY; BUT HE CONTINUED. I COULD HAVE TOLD HIM TO 'STOP' AND GET ON THE RADIO FOR CLARIFICATION; BUT I DIDN'T. 4) NO MATTER HOW FAMILIAR THE OTHER GUY SAYS HE IS WITH THE ARPT; MONITOR; MONITOR; MONITOR.