JFK LCL CTLR CONCERNED ABOUT JFK AND LGA AIRSPACE; APCH AND VFR HELI ROUTINGS AND SUGGESTS A NEED FOR A PRECISION APCH PROC THAT MIRRORS THE JFK VOR RWY 13L APCH PROC.

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JFK WAS ON THE VOR RWY 13L APCH (A CURVED APCH THAT REQUIRES THE ACFT TO VISUALLY FOLLOW LEAD-IN LIGHTS FOR THE LAST 5 MI); AND IT WAS VERY HAZY WX. A B777 HAD ALREADY LINED UP FOR WRONG RWY PRIOR TO THE INCIDENT IN QUESTION; AND HAD TO BE SENT AROUND. I WAS WORKING A HELI THAT WAS WBOUND ON THE TRACK ROUTING (ABOUT 1/2 WAY BTWN JFK AND LGA) AT 1000 FT. THE A340 APPEARED TO BE DELAYING ITS TURN TO FINAL; AND I INSTRUCTED IT TO TURN IMMEDIATELY TOWARDS THE ARPT (FEARING THAT IT WOULD CONFLICT WITH THE HELI). THE HELI HAD THE A340 IN SIGHT AND WAS ACTUALLY ABOVE IT. THE A340 LANDED RWY 13L. IN THE MEANTIME; A B747 WAS TURNED OVER TO ME ON APCH WITH MINIMUM SEPARATION BEHIND THE A340 AND THE B747 WAS MUCH FASTER. THUS; I HAD TO 'SCRAMBLE' TO GET THE B747 TO SLOW DOWN SO THAT IT COULD LAND. SINCE THE A340 'OVERSHOT' THE FINAL AND HAD TO TURN BACK; ITS EXTRA FLYING MI MADE IT OBVIOUS THAT THE B747 COULD NOT STAY BEHIND HIM AND WOULD HAVE TO BE TAKEN OFF OF THE APCH. SINCE WE HAVE VERY LIMITED AIRSPACE AT JFK; A MISSED APCH ON THIS CONFIGN NORMALLY HAS TO BE TAKEN OVER THE TOP OF THE ARPT. I INSTRUCTED THE B747 TO CONTINUE ON A NE HDG; SO THAT HE WOULD PASS BEHIND (AND ABOVE) THE A340; THEN TURNED HIM EBOUND (JUST N OF JFK ARPT); AND THEN SBOUND. THE HELI WAS FAR ENOUGH W THAT IT WAS NO FACTOR FOR THE B747 BY THIS TIME. IN CONCLUSION; THIS WAS AN UGLY SIT BUT IT COULD HAVE BEEN WORSE. THERE IS NO ROOM FOR ERROR (VERY LIMITED AIRSPACE) IN THIS SIT; ESPECIALLY WHEN HELIS ARE BTWN JFK AND LGA. THE 'TRACK ROUTING' IS USED A LOT; HOWEVER; MAYBE WE SHOULD NOT USE IT DURING MVFR WX WHEN JFK IS ON THIS APCH. FINALLY; SINCE AIRSPACE ISSUES NORMALLY PREVENT US FROM USING THE ILS RWY 13L APCH; WE DESPERATELY NEED A PRECISION APCH THAT FOLLOWS THE VOR RWY 13L PATH!