I really don't know what those invisible files are. could be DS_store or icon previews. Can you view the Cd fine with those files?
I did come across Dragon Burn which says it can burn Picture Cd's to view on the newer DVD players.
You can download a free trial and see how it works.
Here is a review:
http://www.applelinks.com/p5/index.php/more/dragonburn4/