I did the GreenFlag.com conversion utility that's discussed here. Not sure if it still works, as I'm in the US, and don't even have GPSApp running anymore.. ;P

The problem with this source of information, is that it only gives information about where the turns are, and not the in-between coordinates for displaying the road accurately. This works simply as a way of assiciating turn directions with GPS coordinates, but isn't up to the same level of detail that mapsonus.com provides.