Rally works on the 'Ghost car' concept.
You are constantly racing against your best laps. Also featured in this new game is a fully featured map editor to allow you to design tracks that can be easily shared between friends or over the internet. Registration key which will entitle you to free upgrades to all future versions, and unlock some of the more powerful game features. The downloaded file is actually a ZIP file. You must first extract the contents to a temporary directory, and install from there.