How to install PHPUnit on XAMPP
1. Open a command prompt and go to C:\xampp\php
2. Type "pear update-channels" (updates channel definitions)
3. Type "pear upgrade" (upgrades all existing packages and pear)
4. Type "pear channel-discover components.ez.no" (this is needed for PHPUnit)
5. Type "pear channel-discover pear.symfony-project.com" (also needed by PHPUnit)
6. Type "pear channel-discover pear.phpunit.de" (This IS phpunit)
7. Type "pear install --alldeps phpunit/PHPUnit" (installs PHPUnit and all dependencies)
easy as pie.. credit goes to bitshift from the kohana frameworks forum