'Sex in a Cold Climate' on DVD?

The documentary that inspired the film
http://en.wikipedia.org/wiki/Sex_in_a_Cold_Climate
is according to this
http://www.imdb.com/title/tt0380703/trivia
as a bonus on the DVD of The Magdalene Sisters.

But on "the" DVD isn't very helpful, since there are
different versions out there and for every region again
different features. So which one exactly has the
documentary included?