A BE20 CREW VIOLATED THEIR CLRNC BY USING THE WRONG RWY FOR TKOF.

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ON OCT/WED/01 I WAS THE SIC OF A BEECH KING AIR 200 DEPARTING CDW AT XA30. THE TWR WAS NOT IN OP; SO THE FIELD WAS AN UNCTLED IN THE ENHANCED CLASS B AIRSPACE. THE PIC RECEIVED OUR CLRNC FOR AN IFR FLT TO HPN USING A TELEPHONE LANDLINE TO TRACON. I WAS GETTING THE LATEST WX ON THE COMPUTER BUT OVERHEARD SOME DISCUSSION AS TO WHICH OF THE RWYS WE WERE GOING TO USE; BUT WAS NOT SURE WHICH ONE WAS DECIDED ON. I SUGGESTED THAT HE TAKE THE PHONE NUMBER FOR TRACON SO THAT WE COULD USE OUR CELL PHONES IN THE EVENT WE OVERRAN OUR CLRNC VOID TIME OR IF THERE WERE ANY OTHER QUESTIONS PRIOR TO TKOF. THE PIC MADE NO COMMENT TO THAT DECISION AND COMMENTED THAT WE WERE CLRED TO 2000 FT AND TO EXPECT 3000 FT IN 10 MINS AFTER TKOF; AND THAT THE RTE WAS CDW-BREEZY-CARMEL DIRECT HPN. AS THE WIND WAS NEARLY CALM; I CHOSE TO TAKE OFF ON RWY 4 AS IT WAS IN THE DIRECTION OF OUR FLT. IT TOOK ABOUT 15 MINS TO START; TAXI AND RUN UP. AS WE TOOK THE RWY FOR TKOF; I ASKED THE PIC ABOUT THE STATUS OF OUR CLRNC VOID TIME AND HE RESPONDED THAT WE WERE OK TO GO. IMMEDIATELY AFTER CHKING IN ON DEP FREQ; THE FIRST CTLR THAT TALKED TO US WAS COMPLETELY REPLACED BY THE CTLR WHO HAD SPOKEN TO THE PIC ON THE LANDLINE. THE CTLR WAS VERY UPSET BECAUSE WE HAD TAKEN OFF ON RWY 4 AS OPPOSED TO RWY 22; WHICH WE WERE CLRED FOR. HE FURTHER STATED WE DID NOT DO THE SID. WHILE THERE IS NO PUBLISHED SID; THE LCL IFR CLRNCS ISSUED; REGARDLESS OF RWY; NORMALLY CALLS FOR A L TURN TO A HDG OF 180 DEGS CLBING TO 2000 FT FOR RADAR VECTORS TO THE DEP FIX OFF EITHER RWY. DURING TWR OPERATING HRS SOMETIMES A FLT IS CLRED DIRECT TO BREEZY BY TRACON THROUGH THE TWR WHEN DEPARTING RWY 4. I ASSUMED; RATHER THAN CHALLENGED THE NORM; THAT DIRECT BREEZY WAS GIVEN TO THE PIC ON THE LANDLINE CLRNC. THE CTLR WAS UPSET WITH OUR NOT FOLLOWING THE CLRNC; SINCE; AS HE SAID; IF IT WEREN'T FOR THE FACT IT WAS SO EARLY (TFC LIGHT) WE WOULD HAVE CONFLICTED WITH TEB VOR-A APCHS WHICH PASS OFF THE END OF RWY 4. THE LESSON THAT I LEARNED FROM THIS EXPERIENCE IS THAT CRM CANNOT FUNCTION WHEN 2 PLTS DO NOT HEAR THE CLRNC SIMULTANEOUSLY. THE SECOND PLT IS UNABLE TO CHALLENGE A CLRNC RECEIVED BY THE OTHER PLT OVER A LANDLINE. IN THE ACFT; BOTH PLTS HAVE THE ABILITY TO LISTEN TO ATC COMS SO WE BOTH CAN VERIFY THE CLRNC. WHEN USING A LANDLINE; THE NON COMMUNICATING PLT SHOULD CHALLENGE THE OTHER PLT AS THOUGH THEY WERE IN THE ACFT. THE COMMUNICATING PLT SHOULD BE CHALLENGED AS TO VOID CLRNC TIME; AGREED DEP RWY; RTE; ALTS AND FREQS. ABSENCE OF A CHALLENGE CAN BE DANGEROUS FOR EVERYONE. IN ADDITION; ONE SHOULD NEVER ASSUME ANYTHING. I SHOULD HAVE CHALLENGED THE PIC ABOUT THE FACT THAT WE WERE GOING DIRECT AND TURNING TO THE 'NORMAL' 180 DEG HDG.