The easiest way:
check the item on the link below:http://www.i-source-global.com/epages/170990.sf/?ObjectPath=/Shops/170990/Products/RFMP3SD2&ViewAction=ViewProductViaPortal&Locale=en_US
Copy your audio file from the disc to a USB (pen drive) I am assuming your files are in mp3 format. Else use the audio ripping software mentioned below to rip the audio file and save in mp3 format and copy that file into the pen drive/SD card.
Connect the transmitter to your cigarette lighter adapter. Turn your car radio on. Tune the FM channel to a frequency, where there is no radio channels. Note that frequency. There will be a + and minus button on the transmitter. Press it up or down to bring the transmitter to the noted frequency. You can now hear the audio through your radio.
Different options of this transmitter are available. Some use a SD card instead of USB drive. All cost around $25.00
The second method is to rip the audio files to your hard disc. Use any software. For an example,
Check the link below:
Download and Install. If your cd player is capable of playing MP3 files, rip the audio files from your disc as mp3 files to your hard disk. copy them to regular cd's. (assuming you have a CD burning software)
If your cd player is not capable of playing mp3 files, rip them and save as .wav files.
Then you need a cd burning software.
Go to the link below:http://alternativeto.net/desktop/k3b/?platform=windows
Download K3B. Install
Open it. Select, a new audio project.
Drag your .wav files into it. Burn it. and you are ready to go.