[QUOTE 1714470, member: 9609"] I can easily convert them to MP3 but how would a head unit recognise the artist / track information. What is the file naming protocol so as devices such as ipods / car stereos recognise?[/quote]
As Zexel suggests, the units recognise ID3 tags, which are not (necessarily) related to the file names, although most software does use some combination of the artist / track / album name when it creates the file, you can edit the file names without changing the ID3 tags.
Depending on your operating system, it might be easy to view / change the tags (if using Win7, for instance, you can view / amend album artist, contributing artist, track number, title, genre etc directly from Windows Explorer, but I think you needed an ID3 editor in some older versions.)
The same tags are also used by WMP, itunes, WinAmp etc to identify tracks, and you can usually edit them directly in the software player too.