Yes, it doesn't cost you anything. However, the game is copyrighted by the authors. You are allowed to play the game if you accept license agreement. It can be found at the beginning of the installation program.
First step is to register yourself as a player here. After that you can submit scores from the game. The game will ask if you want to submit the score after you have completed a game of ten pin.
Your firewall may be asking for permission to connect to the Internet in the background. Try to switch window by pressing ALT + TAB.
See previous entry.
Tenpin bowling rules can be found e.g. from Wikipedia.
Please click here.
Your replays are stored in "replays" folder under Bowling Evolution installation folder. Shortcut to the replays folder can be found from Windows start menu: Start -> Programs -> Bowling Evolution -> Replays. You can copy replay files from this folder to your friend. Replays can be viewed from the game by selecting "View replays" from the game.