Now, you can download the full version of Nokia Map Loader Version 1.3 instead of the old version 1.1 previously. It does not support Windows Vista yet. I am surprised that Nokia N82 is not supported since it comes with built-in GPS.
The drawbacks are that you are unable to check which maps you have downloaded to your mobile phone already. Also, the only way to delete any maps is to delete all maps which is inconvenient.