HMVC - MY_Modules - extending modules.php

[eluser]SPeed_FANat1c[/eluser]
Hi, there is possible to extend router.php and loader.php but I tried extendint modules.php the same way, but no success - the is no signs that it has been called. I guess this is because native CI does not have modules library and therefore it does not work when I have file MY_Modules.php

Have someone tried doing this? Or have any thoughs how to do this?