A CHALLENGER 604 CAPT RPTED A TRACK DEV DURING APCH TO LAS WHILE ON THE SKEBR RNAV ARR.

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WHILE ENRTE TO KLAS; WE WERE FLYING THE SKEBR RNAV 1 ARR. BEFORE REACHING KEPEC INTXN; WE WERE CLRED DIRECT TO IPUMY INTXN AND TOLD TO EXPECT RWY 19R AT KLAS. THE SKEBR 1 ARR APPEARS OVERLY COMPLICATED AND IS SOMEWHAT CONFUSING. PRIOR TO REACHING IPUMY; I PROGRAMMED THE FMS FOR A RWY 19R GPS APCH. IPUMY WAS THE START OF THE GPS APCH. BEING UNFAMILIAR WITH THE PROCS AT KLAS; I WAS THINKING THEY WOULD CLR US FOR A R DOWNWIND FOR RWY 19R. WRONG; I SHOULD HAVE READ THE FINE PRINT; WHICH WOULD HAVE KEPT ME FROM WRITING THIS RPT. AT IPUMY; I ACTIVATED THE GPS RWY 19R APCH AND STARTED A TURN N; THINKING THEY WOULD CLR US FOR A VISUAL APCH WITH A R DOWNWIND FOR RWY 19R. WE WERE ASKED WHERE WE WERE GOING AND WHEN WERE TOLD TO MAKE AN IMMEDIATE R TURN DIRECT POVOC. I WAS UNSURE ABOUT TURNING L AT IPUMY AND SHOULD HAVE QUESTIONED APCH CTL. ORIGINALLY; WE HAD THE FMS PROGRAMMED FOR A RWY 25L APCH. IT JUST DIDN'T MAKE SENSE TO OVERFLY THE ARPT AND MAKE A LNDG ON RWY 19R AND ALSO OVERFLY THE APCH TO RWY 19L. ALSO; WITH INTXN HUSOL CLOSER TO RWY 19R; IT MADE MORE SENSE TO HEAD THAT DIRECTION. AT MOST LARGE ARPTS; YOU DON'T OVERFLY RWYS OR APCHS TO RWYS. AS OF JAN/FRI/03; A REVISION TO THE SKEBR 1 ARR IS THE SKEBR 2 ARR; WHICH ELIMINATES HUSOL ; NELLE; NAPSE; CONDY; AND OTHER INTXNS. IPUMY; POVOK; AND KIMME ARE STILL THERE. A LOT LESS CONFUSING. AFTER SPEAKING WITH THE SUPVR OF APCH CTL; NUMEROUS OTHER PLTS HAVE HAD THE SAME CONFUSION. I LEARNED YOU HAVE TO READ THE FINE PRINT OF THE ARR AND NOT JUST THE DIAGRAM.