Multiple Ammo Weapon Creation.. How?

I tried to make a handcannon like x-com..

For this reason,

1-i copy-paste a rocketlauncher cod, made it different named-pictured.. OK

2-Create a ammo type as weapon like a rocket.. OK

3-At rocket launchers weapon.xml file, ammo cod is

"<Cell ss:StyleID="s66"><Data ss:Type="String">ammo.rocket</Data></Cell>"

And the new ammo is weapon.rocket.bullet..

-If i dont give the name as weapon.rocket.**** , i cant see it at rocket tab even its coded so..

-Even i dont assign any other ammo to my new one, new weapon can use all rockets at rocket tab.. and standart rocket launcher can use my new ammo..

-I changed weapon bullettype to normal.. nothing happened..

-I changed ammo.rocket to ammo.cannon and made the ammo name weapon.cannon.bullet, game crash at inventory..

So is there anyone who could pass this problems? i want my cannon ...

Looked to xenofobias multi ammo weapons but they are not working either..

The game dosent support multi ammo for a single weapon. The only way is create items "rocket" type and then give them properties. Remember check the start of the string line of each weapon, it need to say that the weapon use "rocket".