Playlable plataforma discuss

[Alcon2009]

Hi. I wanted to do a playlable platform and i did it, i Made a arc Padilla controlable and it worked, but My question it's how i can change weapons or how or Open a ndx or dll file because i think the weapons are around dll files, and too if wanna know how to change weapons or make them fire, i'm having a problem with 40mm Breda bofors cannon because it doesnt shoot, i Guess it's because bofors 40mm it's maybe not a user bulllet and for the front cannon i'm using a user Shell 76mm gun and it worked un his real positions. Can someone help me with one of these problems??