the automatic course does not work in the Ju88 in the moment because its Gyro compas is not working.
It works in the He111 for sure, in the Bf110 i havent checked
and set your bomb mode to intervall, make the interval length maximum (that comes before the 1 ! ) and set your desired interval delay (that means the distance of the bombhits on ground).
the bombardier can not release the bombs without the automatic bombsight, only the pilot can. also you have to check what bombbaydoor commands are working (cant remember in the moment) . sometimes the "toggle bombbaydoors" do, sometimes only the "open bombbaydoor"&"close bombbaydoor" do....
mode salvo or single i recommend for diveattack or low level attack.