To install this plugin, unzip the vox-crossposter.zip file and upload vox-crossposter.php into you plugins directory.
To upgrade the plugin, first deactivate the plugin from the Wordpress control panel. Now copy the new vox-crossposter.php script over the old script. Now, activate the plugin and you are done!
Activate the plugin via the WordPress plugin manager. Go to the Options menu and look for the Vox X-Poster sub-menu. In the input box, type in your mobile blogging email address provided by Vox.