Re: Worldwide routable Garmin maps: URL REMOVED

Have you tried the JaVaWa tool linked in the FAQ to change the product id (and name) of an already installed map? After that you can install a second map. Rinse and repeat to install as many maps as you want...

Edit: Ah, I see you tried changing names, but you need to change product id's as well (which is even more important then changing the name).