you can basically download anything in Mirc as long as the other uses is willing to dcc it to you.
jetmir- basically all you have to do is go the server that you cousin goes to and join a room where they'll let you download games and just download. Of course there are commands to view the games and download the games but everybody uses different commands so just ask those in the room how view, search, and download. It's kindof like chatrooms if you have never used it.