For the tags and cover art I would suggest: Take a look at the MusicBrainz Webscripts. With the help of this scripts you can tag your tracks with a lot of informations. For the lyrics you could use this tool: [WS] MusicBrainz XML Webservice
For the tags and cover art I would suggest: Take a look at the MusicBrainz Webscripts. With the help of this scripts you can tag your tracks with a lot of informations. For the lyrics you could use this tool: [WS] MusicBrainz XML Webservice