The cover I have is reflective and therefore hard to scan.
I have the two disk edition and I know the single disk edition has a similar cover.
If you have this please scan the cover keeping it flat on the scanner bed.
If you can remove dust that would help a lot.
Scanning in 600 dpi (dots per inch) in RGB (Red Green Blue)
and reducing the final image to 300 dpi makes for a better result.
You can see by the covers that I’ve uploaded the kind of quality this produces.