I need some help with scripting Options

[revoke]

Well, first of all my english sucks. I have a problem with a script, i have a script for shooting and its really long but this part here:

def shot
angle = (@direction == 4 ? 3.141592 : 0.0)
$game_map.screen.shot_bullet(@real_x + 128, @real_y + 128, angle, 64, 1, 40, 0, 0)
end

is where you can edit how much damage and other things. The thing is that i want to change the numbers when you have equipped, for example a different bow.

To change them like for example this:
def shot
angle = (@direction == 4 ? 3.141592 : 0.0)
$game_map.screen.shot_bullet(@real_x + 128, @real_y + 128, angle, 64, 2, 40, 0, 5)
end

But i dont really know much about scripting so if someone knows help me, must be with if command or something like that.