* Script is executed relative to the Wordpress directory rather than specifying the directory manually.
* Existing Wordpress directory isn't manipulated, instead the script installs Wordpress into a directory below it.
* Old wp-content directory is symlinked rather than copied.
* General error handling added to prevent script from failing in certain scenarios.
* Script can also act as a database verification tool as it tests out the wp-config.php credentials now. Added bonus.