PBedit is a free online editor which can help you to edit files on a remote webserver without downloading the files first. You can specify your configuration files in the script configuration and those files will be displayed in the file selection menu. There you can choose one to edit. The editor can also make backups of the files before saving the new version so if there's something wrong with the new configuration you still have your old version in the backup directory. You will need the Zend Optimizer to run the script and you can download and use it for free !