#define SHOT_FX                             "electric/fx_elec_gp_wire_sparking_xsml_thick_anim"
#precache( "fx", SHOT_FX );

// add the above underneath the #using statements at the top of your mapname.gsc

function shootable_trigs()
{
    level.shootable_door_count = 0;
    trigs = GetEntArray( "shootable_door", "targetname" );
    level.shootable_door_goal = trigs.size;
    foreach( trig in trigs )
        trig thread wait_for_shoot();
}

function wait_for_shoot()
{
    self waittill( "trigger", player );
    player PlayLocalSound( "zmb_cha_ching" );   // Change this to any sound alias you want
    model = GetEnt( self.target, "targetname" );
    PlayFx( SHOT_FX, model.origin );
    waiti(0.05);
    model delete();
    level.shootable_door_count++;
    if( level.shootable_door_count == level.shootable_door_goal )
        self open_door();
}

function open_door()
{
    doors = GetEntArray( "shootable_door_reward", "targetname" );

    foreach( door in doors )
        door PlaySound( "zmb_cha_ching" );
    wait(0.05);
    foreach( door in doors )
        door delete();

    flag = doors[0].script_flag;
    level flag::set( flag );
}


2) At the top of your mapname.gsc add the following code