Read this blog post, download the service firmware, and simply update your camera through the web interface. Your camera will be permanently converted to the European model.
The firmware will make all the changes proposed in this forum thread on its own, after which the camera will become a fully European model that can be upgraded to the latest firmware version for this model.
Read this blog post, download the service firmware, and simply update your camera through the web interface. Your camera will be permanently converted to the European model.