The only way you could do this is by first completing the weapon placement, and then editing the resulting .txt. Change an entity name in the list ("weapon_zm_pistol" for example, but it can be any entity you've placed) to the flare gun's name ("weapon_ttt_flaregun"). In the spot where you placed that pistol, the game will spawn a flare gun. Note that you probably can't import the script in the weapon placer anymore after that edit.
Thank you very much worked like a charm... it would be nice if that stuff was somehow able to be imported (that was one of the first things I tried) Damn edit breakin stuff. Well if that is ever included in an update that would be great, right now I just will use random weapon and random ammo and replace them.