You might be able to using one of these usb to audio lead you can also get these just as adaptors without the need to for a lead
http://www.ebay.com.au/itm/3-5mm-Jack-Plug-to-USB-Male-MP3-Mp4-Audio-Data-Cable-White-/330831058200?pt=AU_Electronics_Portable_Audio_Accessories&hash=item4d07115518 $4.12 3.5mm Jack Plug to USB Male MP3 Mp4 Audio Data Cable White or
http://www.ebay.com.au/itm/USB-Male-to-3-5mm-Audio-Stereo-Headphone-Jack-Plug-Cable-For-MP3-MP4-Black-/160733005608?pt=UK_Computing_Sound_Vision_Audio_Cables_Adapters&hash=item256c6f0728 $1.50 free postage You might get these on Ebay im not sure which country you are in this might guide you to one You could get this on Ebay if you dont have an account you will need to create one.
https://scgi.ebay.com/ws/eBayISAPI.dll?RegisterEnterInfo Add Email adress Add Bank Acc Add Credit Card also Add your Postal Adress also Add a PayPal account. Click on the Ebay tab on top of page from the drop down list you will see specific pages. On left hand side on Ebay summary page you will see the PayPal link. when you get to the PayPal login page at the bottom you will see new to paypal sign up tab. Paypal to create an account PayPal registration password ,bank card /credit card,phone numbers home/mobile ,email adress and a Postal Adress. Be very specific when you type in the search. Always ask questions? before you make a purchase and keep the email/s for security reasons if the item arrives and its not as described. You will even see the pictures of your item so you cant make a mistake and get them home delivered. Music has become more mobile than ever before, as numerous devices can store and play music on-the-go. Companies have developed car audio decks that incorporate USB ports in the faceplate. This allows flash drives to be plugged into the deck, and music on the drive to be played. Flash drive format issues are minimal, considering nearly all flash drives are formatted in the FAT32 file system by default. FAT32 is readable by any operating system, or stereo deck with a USB por Determine if the stereo deck in the vehicle is capable of playing music off a USB flash drive. Read the stereo deck user's manual, or inspect the deck faceplate for a USB port. Plug a USB flash drive into an available USB port on a computer. Check the drive to make sure there is enough available space for music files. Using Windows, double-click the desktop icon labeled "My Computer." Right-click the flash drive icon, and select "Properties." Capacity will be shown. Using Mac, click the flash drive icon once it appears on the desktop. Click "File" in the top menu bar, then click "Get Info." A dialog box appears, and capacity is listed. Drag and drop any desired music files onto the flash drive. Be sure the files are in .mp3 format. Although some stereo decks are capable of playing other music types, the .mp3 extension is universal and all decks will play it. Spend a short amount of time organizing the files into folders. Organize by genre, artist, or create mixed playlists. Selecting music while driving will become much less distracting. Close the drive window, and safely eject the flash drive from the computer. Plug the flash drive into the stereo deck of the vehicle. Select the USB port as the music source, via the stereo deck. Read the manufacturer's user manual if unsure of how to change the source. Adjust the volume, listen, and enjoy. Hope this helps.