I think there will be 4, and they will be launched by wing hard points.
Color & duration? -shrugs-
-Edit-
This MUST be the version we will be getting, might not be that useless.
Fi 156 F or P - Counter insurgency version. Identical to the C-3 with machine guns in side windows and bomb-racks/smoke laying. (produced in 1942)
The Fi 156F or P was a Police or anti-Partisan version of the aircraft, armed with small bombs and forward firing machine guns. (!!!!)
"The Fieseler Fi 156F or P (for Police) was a version of the Storch designed for internal security and anti-partisan activities. It was similar to the Fi 156C-3, but carried two Rost 24 SD 2/XI bomb racks, one on each wing, mounted just beyond the wing struts. Each of these racks could carry 24 SD 2 fragmentation bombs that could be dropped in batches of four or in a single long salvo. The P may also have carried two MG 15 machine guns mounted on either side of the cabin, as well as a loudspeaker system designed for psychological warfare. The service record of this variant is unclear, although it may have been used by the SS during the Jewish uprising in the Warsaw ghetto in 1944."
http://www.historyofwar.org/articles/weapons_fieseler_fi_156P.html