Instructions for Installing the Rotations files. You should have downloaded Rotations.zip - The complete suite of packages, palette and notebooks. There are several places that the package could be placed: a) Probably the best place is to evaluate $AddOnsDirectory in Mathematica. This will give you a place to put application files that is completely outside the Mathematica system files and will remain the same even if you update Mathematica. For example, on my Windows system it is C:\Windows\All Users\Application Data\Mathematica. It will be in different places on other systems or other versions of Windows. There you will find an Applications folder. The Applications folder is the target folder. ($AddOnsDirectory is not supported in early versions of Mathematica.) b) You could use the AddOns\Applications folder within the Mathematica folders as the target folder. Having picked the target folder... 1) Select the downloaded zip file and RIGHT drag it to the target folder (Applications). 2) Choose: Extract to the target folder (Applications) (not the Rotations folder). 3) If you are updating a previous version choose to replace all files. At the conclusion your should have the structure: target folder \Rotations (package files and notebooks) \FrontEnd \StyleSheets (RotationsStyle.nb) _______________________________________________________________ That should work. If you have problems please contact me. djmp@earthlink.net