I have a 1998 GS300. I think the dealer updated the nav map in 1999.

I would lovvvvvve to get an update so the new and changed roads would show.

What are my options? Specifically,

1. How new is the newest map update that can be installed?

2. How hard would it be to updated it myself? And, if it's not too hard, what basically would I need to do?

Thanks!