Here is a screencast which shows the install path for CRM 4.0. In this example I’ve used a config file (hence the /config ifd.xml) in the command path. As you can see installing CRM is really easy and it was complete in less than <30 minutes.
Screencast: Installing CRM 4.0 (Codename Titan).
BTW: The build shown here was 7332 which is newer than RC0 (Build 7309).