Just because electronic spreadsheets like Excel 2002 have become almost as commonplace on today's personal computers as word processors and games doesn't mean that they're either well understood or well used. If you're one of the many folks who has Office XP on your computer but doesn't know a spreadsheet from a bedsheet, this means that Excel 2002 is just sitting there taking up a lot of space. Well, it's high time to change all that. One look at...