With a CPL/IR with ATPL subjects done in Oz and then converting it to a JAA one it is very expensive. You would have to do ALL ATPL subjects again plus the IR ( less 5 hours or so).
To get any "exemptions" you must have a full ATPL with at least 500 hours multi crew experience. You still must do the 14 exams!
It's a pity as the flying is great in Oz....