I downloaded the MP3Tag program and I'll give it a try tomorrow. It can't be any worse than combing through the album art cache (a couple times a week!), removing everything that I know doesn't belong, and then trying to install the correct artwork in WMP (which doesn't fix the wrong artwork in Windows Explorer!) only to find the next day that several are wrong again!
It'll take some playing around to fully appreciate how to use MP3Tag, i.e. its customization settings, how you arrange the columns, how you can most efficiently modify the data in a tag (i.e. you can either (a) enter data in the "tag pane", which I feel to be a bit clunky and slow but does allow you to manipulate album art if you need to, or (b) overtype directly into the detail list fields using the TAB key to enter/move-to-the-next-field, and ESC to end the edit of a given row), etc.
Here's what my MP3Tag interface looks like, although I generally do NOT have the "tag pane" showing since I'm a "power user" and simply type/tab/ESC my way through the detail rows themselves.
I probably shouldn't be so picky but this stuff not only messes up my WMP, and music library but also my mp3 player, so I want everything just so.
I don't use WMP except for playing videos. I use Winamp for playing music. I also have G-Force installed as my "visualization", because I think it's fantastically entertaining. I also have the "Album Art" window active for Winamp, to present the "cover.jpg" art when I play music.
My Winamp presentation looks like this:
I have always used folder.jpg (in XP, should it be cover.jpg in Windows 7?) for each file,
Depending on the Windows player program you use, you can typically use either "folder.jpg" or "cover.jpg" with no consideration.
However my Cowon J3 portable music player only supports "cover.jpg", so that's what I've used on my PC collection. I simply COPY/sync my PC's music collection folders to the J3 storage, so going with "cover.jpg" works for both PC and J3.
but that didn't add the album artwork in WMP
Again... I don't use WMP because it's under-engineered and clumsy. Using Winamp, or Jaangle, as the player, is the real solution for me. I like Winamp because it also provides song-specific EQ-presets if you want to make use of them, so that each track when played will load it's own unique saved EQ settings (that you created yourself) for optimal sound for each and every track. Or, you can use a default EQ if you have no specific previously saved EQ for a given track.
Jaangle has just one 3-band EQ, but it still seems to sound great. Plus, its organizer interface/presentation is far more powerful and user-friendly than Winamp's, and it makes browsing and playing music a breeze.
so I would cut and paste that artwork on the album and then I would have a couple more pictures added to the album folder. Thought I was doing it right....
It's really really easy and straightforward, if you simply have just one single external "cover.jpg" file in an album folder, and no imbedded album art in any music file.
Then you can use Windows Explorer or any similar File Manager (e.g.
Free Commander) to maintain your collection.
You can download album art from Amazon (locate the album you are interested in, as if you were going to buy it, and then click on the "see all customer images" link and examine each one, deciding which one you like and then downloading it to your album folder as "cover.jpg) if you don't have your own CDs and scanner. Mostly the art on Amazon is excellent, and I look for high-quality 500x500 images.
In my own case if I can't find a good one I'll scan my own CD cover and tweak it with Photoshop, and then re-size to 500x500 and save it as "cover.jpg" in the album folder.
But again... no imbedded art, use external "cover.jpg" universally in album folders for compatibility with PMP's and PC, and use Winamp or Jaangle as the music player (not WMP).
Note that both Winamp and Jaangle can also produce M3U playlists, if you want to make use of that functionality as well.