I am a European and did my training in Florida as many others. After my FAA CPL ME I headed home for the conversion for the JAA CPL. What I had to do first was to do the written ATPL. I spend around 9 months reading by myself and did the exams. cost around 4000 Euros including books. Then the conversion flights minimum 10 hours pluss a skill test in the end to get the JAA ME CPL. Cost around 6000 Euros. I spend 11 months in total.