The Ford doesnt do straight digital. Well, it does play wav...
Wav.. mp3..flac.. etc etc - all of those formats imply that the actual reading of the CD data is akin to a "data" type of CD (or DVD.. just more MB's to store there), versus audio which conforms to the original "Compact Disc" for music all 44.1khz sampling rate and whatnot.
In summary and why I am asking, is that we need to know each player's capabilities, to choose the correct format that will support both. From there, you can decide whether or not to do a single CD burn that will work for both, or separate burns so that you are not limited to, again, the "least common denominator"
Hope this clears shit up around here lol..