Hi! I use the iTunes Agent Software. Its free.
http://ita.sourceforge.net/download.html
To get iTunes working with your player:
1) Open your My Documents folder.
2) Make a new folder and name it My iTunes.
3) Turn on your MP4 Player and with the USB cable, plug it into your computers USB port.
4) Click on the My Computer Icon.
The Player's folder will say Removable Disk with a letter in brackets. The letter on your screen may be different then the letter G in the picture.
4) In the MP4 Player folder Create a new folder and name it My iTunes.
5) Start iTunes. On the bottom left hand corner you will see a cross. Click on it to create a new Playlist. Name it My MP Player
6) Start iTunes Agent. In your system tray, right click on the iTunes Agent Icon. Click on Perferences.
7) The iTunes Agent Preferences screen will appear.
Click New
In the Name Box type My iTunes.
In the Synchronize Pattern box select iTunes from the drop down list.
In the Music Folder select My iTunes from the drop down menu.
In the Recognize by folder/file type My iTunes
Associate with playlist: just leave it as Use device name...
Click Save
8 - Go back to iTunes. Get the files you want. Drag and drop them into your My MP4 Player playlist.
9) In the System Tray on the iTunes Agent icon, right click and select Synchronize devices. A set of bars will appear over the System Tray indicating the synchronizing has begun and will disappear when its done.
That's it. Now when you start the iTunes Agent, it will start iTunes automatically and when you plug in your MP4 Player into your USB port, with iTunes Agent running will detect your player automatically. Follow steps 8 to 9.
Its an awesome program and I love it. I get all kinds of stuff from iTunes not just music. Its a one stop shop for free and paid media.