FAA CPL(H) : You need minimum 150 hours total time to get it issued of which 100 hours P1 of which minimum 35 P1 in Rotorcraft and the other 65 can be on Aeroplanes. The course is 25 hours.
JAA CPL(H) : In your case minimum 105 Hours on Helicopters to start the 30 hour course (less if you have FAA CPL H !! at schools discretion). To get the JAA CPL(H) issued you will need minimum 135 hours total time on Rotorcraft.
Check out this link :
Add On Ratings