Not sure if you are still having this problem, but I just solved the puzzle myself, so figured if anybody else might need a solution, this should be it.
This is the line i used myself:
assets[] = {{O_Heli_Attack_02_black_F,3},{O_Heli_Light_02_unarmed_F,3},{O_APC_Tracked_02_cannon_F,4},{O_MBT_02_cannon_F,3}};
So with your listed assets there, it should probably be like this:
assets[] = {{I_Heli_light_03_unarmed_F,4},{I_Heli_Transport_02_F,4}};