After copying about 1,000 songs to the 4GB SD card in the nuvi 350 I use to play mp3s in my Prius, I notice that the categories displayed are kind of all over the place. For instance, I have the category "Progressive Rock", and also one called "Prog Rock" and then "Rock Progressive" and so on with some other duplicated categories as well. Some songs have the Album or Artist info missing. Does anyone know what program could be used to change this information on existing mp3 songs? I'd like to go in and condense all the spelling variations of different categories, and fill in missing information. Thanks!