Karthiknath, If you cannnot add a new manufacturer, then please ask the web master to add the new manufacturer. Or you can tell me which manufacturer you want to add. I can add a new manufacturer as I am one of the editors of IRC website. So please tell me the name of the manufacturer that you want to add.
Yes, If you cannot see the name of the manufacturer, then you could write to any of the editors or to webmaster. But pls check before writing to any of us, because, almost most of the manufacturers are added to the list.