FOLLOWING A RWY CHANGE SUBSEQUENT TO INITIAL FMS PROGRAMMING; MD11 FLT CREW FAILS TO VERIFY LEGS ON TRISS RNAV SID FROM DFW. CREW FAILS TO FLY THE TRANSITION PORTION.

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THE EVENT ACTUALLY STARTED ON THE GND IN DFW. THE CLRNC WAS CONFIRMED WITH THE FMS AND THE FLT PLAN. ALL THE PROPER POINTS WERE THERE AND CHKED. WE WERE GIVEN A RWY CHANGE ON TAXI OUT AND WHEN THE NEW DATA WAS ENTERED; THE ORIGINAL SID DROPPED OUT. THE NEW RWY WAS ENTERED AS WELL AS THE SID BUT THE TRANSITION WAS NOT LOADED AND A NAV POINT WAS LEFT OUT OF THE RTE. THE CLRNC WAS TRISS2; TXK TRANS. TRISS2 WAS LOADED AND AFTER TRISS THE FMS WAS NOW GOING DIRECT TO TXK; THUS BYPASSING A WAYPOINT. WE WERE INFORMED THAT WE WERE 4 MILES OFF COURSE AND ASKED IF WE WERE CLRED DIRECT TXK. I REPLIED THAT WE WERE PROCEEDING DIRECT TO TXK AT THIS TIME AND WAS THEN INFORMED OF THE DEV. THE BUSY TIME PRIOR TO DEP AND THE LOW TIME OF MY PERSONAL EXPERIENCE WITH THE ACFT ADDED TO THE ERROR. NO TFC WAS IMPACTED AND WE WERE THEN CLRED TO NOW PROCEED DIRECT TO TXK.SUPPLEMENTAL INFO FROM ACN 695819: ATC GAVE US A PHONE NUMBER TO CALL. THEY SAID NO ACTION WOULD BE TAKEN AND THEY WERE JUST TRYING TO REDUCE THESE TYPES OF INCIDENTS AS THEY WERE OCCURRING FREQUENTLY. IN HINDSIGHT WE SHOULD HAVE SLOWED DOWN A BIT AND TOLD THE TWR WE NEEDED A COUPLE OF MINUTES TO REVIEW OUR DEP SINCE WE HAD RECEIVED A RWY CHANGE. COMPLACENT!!