ATPL
Heli Jock,
if you currently hold a CPL with IR then you have a CPL licence. To upgrade to a ATPL then there are a few other requirements to hold. They consist of so many hours night, multi crew time (was 350 hrs), maybe a certain amount of instrument time and I think that's about it apart from also passing the ATPL skills test which can be done on an LPC.
Only then can you apply for a ATPL.
This was how it was some time ago when JAR came in and I am sure it has not changed too much.
The old days of the ATPL being primarily dependent on hours total time have long gone.
Cheers.