I did this last year on my JAR licence in the UK. Really straight forward. I went to the local flying club and met the CAA examiner who had a chat with me about what I am currently flying and looked at my logbook. He handed me the pilot's notes for the Piper Aztec (I think) then the next week I came back and flew a flight test with him. Done.
In the UK it is training at the discretion of the Chief Instructor and a test. In my case there was no training.