I'm not 100% sure that I've fully understood you. But, could you not after scanning the mp3 files, open the album properties. Under the misc tab, remove the album path, then change the album icon to Cd (or whatever)?

Then you wouldn't have to scan your mp3s again?

Alternatively, scan the mp3, then scan your cd. Highlight the the MP3, go to the tools tab, click copy fields, then paste fields onto the CD.. that should avoild cutting and pasting all the fiddly bits!

Just ideas,

David