to Problem 1:
open DMS config.sqf and go to "DMS_UsePredefinedMissionLocations = false;" and set this to true.
Next step: go to "DMS_PredefinedMissionLocations =" there you can set spawn locations.
e.g.
DMS_PredefinedMissionLocations =
[
/* List of positions:
position1: [x_1,y_1,z_1],
position2: [x_2,y_2,z_2],
...
positionN: [x_N,y_N,z_N]
*/
[2159, 13977, 137.355],
[2263.8, 13634.9, 126.175],
[3997.83, 13218.7, 4.89189],
[1357.27, 12790.5, 18.0868]
];