Installed PEAR and followed the directions on http://www.phpunit.de/manual/current/en/installation.html:
pear config-set auto_discover 1
pear install pear.ph
By adding those three lines to the ini, the last one will override everything. Only use this one
include_path = ".;C:\Program Files\wamp\bin\php\php5.3.8\pear"
Edit: adding @Gordon comment. We need to keep \pear
. Because inner pear libraries are assuming that pear already in the include path.
http://pear.php.net/manual/en/installation.checking.php#installation.checking.cli.modifyingphpini