FLC EXPERIENCED HIGH WORKLOAD ON DEP. THE HIGH WORKLOAD RESULTED IN MISSED CLRNCS; ALTIMETER SETTINGS AND NAV ERRORS.

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SO WAS DEALING WITH CABIN CLB; ONE PACK PROB AND ASSISTING CAPT DETERMINING RADIO FIX FOR J6 INTERCEPT. FO WAS FLYING; HAD PUNCHED IN DIRECT FLIRT ON A 280 DEG HDG AND HAD HIS CHART OUT. CAPT WAS COMMUNICATING WITH ATC/FREQ CHANGE AND IDENTING WRONG NAVAID FOR INTERCEPT. DID I MENTION ALTIMETER SETTING WAS 29.40? CAPT SHOWED PAST J6 AND TOLD FO OF NEED TO TURN L TO REINTERCEPT. TALKED FO INTO IT AND HE STARTED TURN. ANOTHER FREQ CHANGE AND NOW LEVEL FL240; ATC ADVISED THEY HAD US AT FL240 AND ABOUT 12 MI E OF J6. THEY GAVE US A HDG OF 275 DEGS TO REINTERCEPT. I TOLD THEM WE WOULD RESET THE ALTIMETERS; FREQ CHANGE. ATC GAVE US DIRECT HVQ WHICH WAS ON OUR FLT PLAN AND IN THE GPS. BACK FLYING RIGHT AND FOUND PROB THAT FLT PLAN WAS DIRECT MXE OUT 278 INTERCEPT J6. ATC GAVE US DIRECT FLIRT WHICH WE FINALLY HEARD CORRECTLY AND ENTERED IN GPS. THE PROB CAME WHEN INTERCEPTING J6 ON THE AMENDED 280 DEG HDG. IF YOU LOOK SW ON J6 FROM FLIRT; YOU COME TO A NAVAID WITH A BOX TITLED ARMEL 113.5 NEXT TO IT WHICH THE CAPT TUNED AND PROPERLY IDENTED. PROB WAS; ACTUAL NAVAID HAS PROPER BOX OVER 2 INCHES AWAY WITH A 90 DEG ARROW POINTING TO IT. TOO MUCH INFO IN TOO LITTLE SPACE WITH TOO MANY FREQ CHANGES WITH DIRECT TO ATC INSTRUCTIONS NOT ON THE FLT PLAN WITH A NOISY PROB ACFT CAUSED EVERYONE (3) TO MISS THE 29.92 SETTING. SOLUTION: PF FLY THE ACFT (HE MAY HAVE REMEMBERED THE SOP TO RESET ALTIMETERS AT FL180). CAPT; WHO WAS DISTR WITH FREQ CHANGES AND NAV IDENT; COULD HAVE BETTER VIEWED AIRWAYS ON THE GND IN A LESS BUSY ENVIRONMENT. GOT BACK IN TOUCH WITH ATC HE HAD PROB WITH. HE SAID NO HARM; NO FOUL; NO RPT. I AM SUBMITTING THIS FOR OBVIOUS ELIMINATION OF FUTURE SIMILAR PROBS BY OTHERS.