A DC10-40 ACR FLT TURNS FURTHER AWAY FROM A PRE-APPROVED DEV OFF THE DEP PROC BECAUSE OF TSTM ACTIVITY IN PROX OF EHAM; FO.

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TSTM OFF END OF DEP RWY. BERGE DEP OFF OF RWY 24 (SPL) REQUIRES SEVERAL TURNS THAT THE CAPT DETERMINED WOULD BE TOO CLOSE TO TSTM. CAPT ELECTED TO TURN L (OPPOSITE OF SID ROUTING) AND TOLD FO TO INFORM ATC. CTLR REQUESTED 'HOW FAR L DO YOU WANT TO GO?' CAPT RESPONDED WITH; '20 DEGS L' AND WE WERE CLRED AS REQUESTED. IT BECAME NECESSARY TO TURN MORE LIKE 60 DEGS TO STAY CLR OF TSTM CELL. DUE TO RADIO TFC; IT WAS HARD TO 'BREAK IN' TO INFORM ATC THAT WE HAD TURNED FURTHER THAN CLRED. THE DUTCH CTLR WENT BALLISTIC AND TOLD US TO TURN R IMMEDIATELY (RIGHT INTO THE TSTM). CAPT CONTINUED TO MAINTAIN VMC JUST OUTSIDE OF BUILDUP (STILL VERY CLOSE TO CELL). ATC CTLR CONTINUED TO INSIST THAT WE TURN RIGHT INTO THE TSTM. COPLT WAS NOT DOING A VERY GOOD JOB OF COMMUNICATING WITH ATC; BUT THE SIT WARRANTED HIS ATTN ELSEWHERE (WX RADAR; IGNITION; HVY TURB; ETC) AND IT WAS A CONFUSING AND BUSY PERIOD. COM SEEMED TO BE A VERY BIG FACTOR IN THIS EVENT. THE CAPT COULD HAVE MADE HIS INTENTIONS CLR BEFORE WE TOOK OFF. CREW BRIEFING AND CRM WERE VERY POOR WITH THIS CREW. I WAS OF THE OPINION THAT IF WE HAD FLOWN THE SID 'AS PUBLISHED' WE WOULD HAVE AVOIDED THE TSTM AND NOT UPSET ATC. MY SUGGESTION FELL ON DEAF EARS (I GUESS I'M ONLY THE SO) FRUSTRATING TO BE IGNORED LIKE THAT.