Is it possible to override file-embedded album artwork with a freestanding JPG file?

[simoncn]

With the current search order for artwork, you would need to create a high-resolution filename.jpg or filename.png file for every filename.flac file to override the low-resolution artwork embedded in the file. See point 1 under "audio file" in the Artwork section.

It shouldn't be difficult to remove all your embedded artwork using a tagging program. Which tagging program do you use at present?