CodePixel

Update: yes it's possible by doing this:
#1: Add this to your Node class:
/** * @brief [ActiveRecord] Database ID Fields * @note If using this, declare a static $multitonMap = array(); in the child class to prevent duplicate loading queries */ protected static $databaseIdFields = array('column_name'); #2: then load node row by custom column like so
\IPS\yourapp\class\class::load($id, 'column_name');  

Problem has been already solved, solution was to change loaded class with hook inside those two functions
public static function supportsModal() & public function __construct()

Problem solved, all i had to do was unset that value inside formatFormValues function.
/** * [Node] Format form values from add/edit form for save * * @param array $values Values from the form * @return array */ public function formatFormValues( $values ) { if(isset($values['fa_icon'])) { unset($values['fa_icon']); } return parent::formatFormValues( $values ); }  

disregard, i've typed 
IPS\forums\modules\admin\forums instead of
IPS\forums\modules\admin\forums\forums  
it works now.