Forums Scripts & Popups add favourite rooms from the commandline?

I have searched, but I cannot find anything in the mIRC.chm file. Im pretty sure that there would be a way to do this, but im not sure if it is built in.

EDIT: My best idea would be to make a custom Favorites. That way you could make your own command to do it, and customize it to your liking. However, this would be my last resort.