On Windows, PEAR is included in current PHP releases (> PHP 5.2). Look for a file named "go-pear.bat". Execute this file and follow the intructions.

Notes: 
 * There is a known bug with go-pear bundled with PHP 5.2.0. So use a newer PHP release.
 * Our PHP installation (PHP 5.2.1) results in errors when try to install PEAR. Updating to PHP 5.2.3 fixed this failure.

If you don't have PEAR bundled with you PHP try the following alternative to install PEAR.

Download go-pear ...
{{{ 
> php -r "readfile('http://pear.php.net/go-pear');" > go-pear
}}}

... and install PEAR:
{{{
> php -q go-pear
}}}