What country are you from?
Have you looked into the option of cadet sponsorship?
Right now, I do not think much recruitment is going on.
If you train in USA at the FAA level, then you must convert to JAA spec.
This is 14 exams (roughly months of studying)
Then JAA CPL ride, it may be done in States / medical needs to be done in Europe
IR conversion, minimum of 15 hrs flying, must be done in Europe as well.
If you really want to get hired by a carrier back in Europe then also look into:
Multi-Crew Coordination Course (MCC)
Most likely you have to dish out $ for a type rating or sign a bond with company.
Search pprune. It has a lot of good stuff!
Posters, feel free to correct my reply if it is not accurate
Good luck
I am about to be done flight training and a college degree course. I have looked into JAA conversion, but I dont think I will do it, at lease not for now.