This is chess training software from absolute beginner (including if you don't even know the moves) to over 2000 elo standard.
If you have never heard of this software then go here:
http://www.elhchess.demon.co.uk/cmentor.htm
To install: First install version 2, then upgrade to version 3, finally install the 2 other modules for Sicilian and K.Indian (optional).