If you are using Mathematica on your own computer, then you will want to install David Park’s two sets of application add-on packages:

• the DrawGraphics add-on; and
• the Cardano3 add-on.

Here’s what to do:

1. Get both add-ons from me, in the form of zip files.
    
2. Unzip each to the AddOns\Applications subdirectory of the main Mathematica directory.  For example, if you installed Mathematica to
   
   d:\Progs\Wolfram\Mathematica5.2
   
   then unzip them to
   
   d:\Progs\Wolfram\Mathematica5.2\AddOns\Applications
   
   When you unzip, preserve the directory structure present in the zip archives .
    
3. Open Mathematica and from the Help menu select Rebuild Help Index.
    
4. Test the installation—in three new input cells, type and then evaluate the following (be sure you use a backquote ` rather than an apostrophe):
   
   Needs["Cardano3`ComplexRoutines`"]
   Needs["Cardano3`ComplexGraphics`"]
   
   ? Cardano3`ComplexRoutines`*
   ? Cardano3`ComplexGraphics`*
   
   ? DrawGraphics`*
   
   If the installation has been done correctly, you should get as output from the second and third input cells lists of hyperlinked function names from these packages.