Modular Extensions - HMVC version 5.4

[eluser]valuk[/eluser]
Hi,

I am new to HMVC and I am facing a dilemma. I was used to extend form_validation library and put rules in config/form_validation.php. Is it possible to create module with MY_form_validation library in it and put rules in modules/model_name/config/form_validation? Is it wise to put each library in separate module or not? Or maybe put all libraries (pagination, session...) that are commonly used in controllers in one module? Or just leave it in application/libraries? I also face same dilemma for helpers?

Thanks