No ideas?
I think the general idea with MC is you don't have to burn CD's. I get most of my music from optical disk, and once it is captured in MC the disk goes in to a storage case and gets packed away. If i needed to print the case artwork, I would use photoshop or lightroom and set up a template. If I didn't have one of those, I would just do it in Word with a template.
I would NEVER print CD disk art labels and stick those on a CD I planned on putting in to anything other than a computer drive. Audio CD players have a nasty habit of getting those labels jammed inside themselves.