I will refer those interested to:
http://www.scribd.com/doc/12721428/Professional-Screenplay-Formatting-Guide adapted from Trottier's book.
Code:
This page shows the formatting of special headings for montages and series
of shots. They are not needed often. Their presence in a script does not
automatically increase its quality.
Montage
A montage is a sequence of brief shots that express the same or a similar
idea.
MONTAGE - RAIDING ENGLISH TROOPS
-- Troops ride through the countryside, intimidating and questioning
civilians; all refuse to talk.
--Wallace’s house burns, as soldiers dig up the graves of his father
and brother, and scatter their bones to dogs.
-- The English search through the woods, finding nothing.
END OF MONTAGE
EXT. WALLACE LANDS - NIGHT...
Series of Shots
The Series of Shots can be used to bundle a few shots with more
diverse pieces of action that have a less obvious underlying theme.
The boundaries are soft, however, and a montage is often used
here, too.
SERIES OF SHOTS - CHUCK DOES BUSINESS IN ST. PETERSBURG
A) A surprised Yuri stands with the attractive assistant as
Chuck takes his clipboard away.
B) An even more surprised Lev stands by his truck as Chuck hands
the clipboard to him.
C) Chuck and the loaders clean off the graffiti.
D) Working alongside the sorters as the packages come in, Chuck
points out how to organize the inflow.
E) Chuck and Lev go over large maps of St. Petersburg with the
drivers. ...
END OF SERIES
However, nobody will blame you if you use a montage here, too:
MONTAGE - CHUCK DOES BUSINESS IN ST. PETERSBURG
--INT. FREIGHT AREA -- A surprised Yuri stands with the attractive
assistant as Chuck takes his clipboard away.
-- INT. FREIGHT AREA -- An even more surprised Lev stands by his
truck as Chuck hands the clipboard to him.
-- EXT. TRUCK PARKING LOT - DAY -- Chuck and the loaders clean
off the graffiti.
-- INT. FREIGHT CENTER -- Working alongside the sorters as the
packages come in, Chuck points out how to organize the inflow.
-- INT. MEETING ROOM -- Chuck and Lev go over large maps of St.
Petersburg with the drivers.
Personally, I find no advantage is using them over the standard sluglines. It is a stylistic choice. And often, since they are used rarely, they will be questioned by a reader. When written as above, you'll notice they do not include dialogue. The last example I pasted in has quasi-sluglines. I have seen narration (V.O.) inserted in this way, but never with dialogue between characters.
This is an instance where we agree but are discussing different media. I agree that a cinematic montage includes both presentation styles (SinEater and NickClapper). However, in the written form, they are often treated differently--as conventions for representing scenes. How the director/editor choose to interpret them is a different visual decision from the descriptive approach used by the screenwriter.
From SinEater's site reference: "Montage /mɒnˈtɑːʒ/ is a technique in
film editing in which a series of short shots are edited into a sequence to condense space, time, and information. " (
http://en.wikipedia.org/wiki/Montage_(filmmaking))