use view method.
and set the name & position for each camera.
look in the manual of "view"
VIEW* camera2_view =
{
layer = 0;
pos_x = 10;
pos_y = 10;
size_x = 64;
size_y = 48;
arc = 45;
aspect = 1;
ambient = 10;
fog = 10;
genius = NULL;
flags = VISIBLE;
}