How do I install graphviz, PEAR on my host's server? message:The PEAR::Image_GraphViz package was not found.

Hello.

I am having trouble getting graphviz to work correctly on my shared server.

Every single tutorial I come across involves command line programming in ubuntu or linux, both of which I have little experience--and no access to command lines, as I am using a shared server on hostgator.

Using the Cpanel, I supposedly installed the graphviz PEAR extension. Now what? After installation, I get this cryptic message in cpanel:

Using Your PHP Extension(s) and Application(s)

You will need to add /home/yourname/php to the include path.
You can do this by adding the following code to your script:

ini_set("include_path", '/home/yourname/php:' . ini_get("include_path") );

where? who?

So I cut and pasted that in_set snippet in the settings.php in my drupal install.

And nothing

Now, looking at my status report screen, i get the following messages:

Graphviz PEAR package -

The PEAR::Image_GraphViz package was not found. Graphviz Filter will still function normally, but some sub-modules (such as CCK Schema and Workflow Graph) will not. Please install the package and/or make sure that the Graphviz Filter settings are set to locate it properly.

and

Graphviz tools- sh: dot: command not found

What do I do? Is graphviz for local installations only?