Is it possible to burn a CD that runs on Audio Cd players as plain audio and on DVD players as a video cd ?
Yes, its possible. Simply create a VCD and add audio tracks after the movie track(s). But remember that you will not be able to have a 74 minute Audio and 60 minute movie on the VCD. It want fit that much. But if you will have a 300 mb movie and about 30 min of audio it will be ok.
When you will insert the CD into the VCD/DVD player it will play the movie , and when you will insert it to the Audio player it will play audio data.
On PC however you will be able to play bouth - Audio & Video