Hello there!
Sorry but I disagree with Fair Weather Flyer.
JAR conversion is not a piece of cake, but coming in the UK with a canadian licence, I managed to convert my CPL in less than 5 hrs (+ skill test), and then was ready to take up the IR test at the end of the mandatory 15 hrs (Finally took it at 20 hrs due to weather + A/C troubles).
The whole process cost me 20000 EUR all inclusive (CAA, VAT, living expenses...).
As far as I could see, FAA guys seemed to struggle a bit more.
Best of luck.
5 Rings