I put together a follow-up video to the 3-node install where I add a 4th node of RAC 11gR2 in VMWare successfully, including extending the database to a total 4 instances.
In less than 10 minutes of video, you will see the cloning of the Grid Infrastructure 11gR2 home, cloning of the Database 11gR2 home, and creation of a 4th instance all running in VMWare.
addNode.sh has changed slightly; it no longer seems to allow an interactive Oracle Universal Installer (OUI) run.
I hope you enjoy this video!