thanks for that will give it a tryMp3tag - the universal Tag Editor (ID3v2, MP4, OGG, FLAC, ...)
Mp3tag is a powerful and easy-to-use tool to edit metadata of audio files.www.mp3tag.de
open the file with mp3 tag and just add your scan of the cover, you can also extract a cover, lets say you got a set off me with a cover, open the file in mp3 tag, click the image and select extract cover