The process of converting a non-JAA ICAO license to a JAA license has been dicussed ad nauseum on here - see here for starters:
http://www.pprune.org/forums/showthread.php?t=231486
The basic process is as follows:
- JAA Class 1 medical
- JAA ATPL groundschool or distance learning
- Pass 14 ATPL exams
- JAA CPL flight test (can be done in Florida or Moncton I think)
- JAA IR flight test
- MCC