Let me clear that up,

I need add_before_body /subsites/dropletlocal/library/global/func-global.class.php;
to work on every site that is hosted, I can't manually add every block or I'd have to do it for over 500 websites, intern taking too long and too much downtime, also I can't because the directory would be different for each server because of file indention of websites with specific settings.