O1000 doesn't support ID3 tags.
The entire indexing structure is based off the file names only. All the other MP3 players on the market now display the ID3 tag information within each MP3 file, like artist, album, track, track #, genre, composer, etc while a track is playing. But the O1000 only uses the file name itself, it does not read the ID3 tag information within the files. It's just not supported by OS apparently.
Also, The VoiceNav feature works off the filenames, so to make it useful, you would need to rename each MP3 filename to the song title only. For instance, many people have thier MP3s named like "The Beatles - The White Album - Cry Baby Cry.mp3" but this would have to be changed to just "Cry Baby Cry.mp3" for VoiceNav to find it. The manual states that the VoiceNav is limited to searching 85 files at a time, so you will need to point it to the artist or album first.
As a comparison, on the two best selling hard-drive pocket MP3 players - Apple iPod and Creative Nomad Zen, you don't have to mess with filenames or directories at all. These players use ID3 tags within each MP3 to index the artist, songs, albums, genres, etc automatically, and they also display the ID3 information of a track while it is playing.
ID3 tag support is industry standard, especially on MP3 Jukeboxes.
