Don't forget to download the patches and Florida etc, software for free from their website
http://www.oddsoft.com
there are a few extra features available.
I have found that although it doesn't have a manual once you get stuck in and use the help it all comes good. Get the Nav fit set up for your aircraft and start details for your home field. Gets quite addictive, flying routes with the aircraft hidden then playing back and making sure you went where you hoped!
I've been flying RANT for a year so if you have any snags do shout.