I'm bought some concealed (Euro?) hinges from Screwfix for the doors of
a row of bathroom units I'm making:
http://www.screwfix.com/search.do;jsessionid=2QAWLRQQVY30OCSTHZOSFFY?_dync harset=UTF-8&fh_search=19361+&x=10&y=8

Now, I've fitted these things from scratch in the past, but I now can't
figure out how the hell to do it! Must be getting old :-(

Which component do you fit first - frame or door ? - and how do you get
the positioning correct? There's no info that came with mine to give
any inkling, and Google is unfriendly on the matter today.

David