Greglocock,
Thanks for the pointer to scilab. I love it! and also the nice thing about is, it runs under MS windows and Linux. Try OO is is a well structured program, also SMS Star office but only v6.0. Also look at Xandros for an OS or Lindows if you like windows drivers.
Look out side of the box! Excel is not the only spreadsheet program. What are you all married to Bill Gates? Try some others. They have more accurate calcs and better graphing, and in general are much more versatile. To top it of, the bonus is most of them will import and export excel files...