This action is used for content of post boxes.

function my_init(){
remove_action("jaw_postbox_vertical", array("jwRender", "postboxMeta"), 15, 1);
add_action("jaw_postbox_vertical", array("jwRender", "postboxMeta"), 9, 1);
}
add_action('init', 'my_init', 10);
The result can look like this:

function my_postbox(){
echo "Something special here";
}
add_action("jaw_postbox_vertical", "my_postbox", 11, 1);
The result can look like this:

List of all hooks you can find HERE