Instructions for Installing the ConicSections files. You should have downloaded ConicSections.zip - The complete suite of packages and documentation. 1) Select the downloaded zip file and RIGHT drag it to the AddOns\ExtraPackages folder in the Mathematica directory. 2) Choose: Extract to the ExtraPackages folder (not the ConicSections folder). 3) If you are updating a previous version choose to replace all files. At the conclusion your should have the structure: AddOns\ExtraPackages \ConicSections (package files) \Documentation \English (Help Documentation files and notebooks) IMPORTANT, you must rebuild the Help Index! When you start Mathematica use Menu\Help\Rebuild Help Index. In the Help window click Add-Ons\Extras\ConicSections to access the documentation. The package is loaded with the statement Needs["ConicSections`ConicSections`"] _______________________________________________________________ That should work. If you have problems please contact me. djmp@earthlink.net