With this plugin you can override options from the database by setting them in a configuration file.
This plugin can be useful if you are to move your blog to a different site. There are many options that needs to be changed if the URL of your blog changes, at least 'siteurl' and 'home'. This is normally done manually updating the values in the database table wp_options, since you can not reach the WordPress administration sites if these URLs are wrong. If you use a plugin that makes use of Google Maps you need to update the API key as well.
This plugin has only been tested with the WordPress 2.1 branch, but might work with older versions. Please report on compatiblity with other versions.