Hi guys,
I have come along this program that lets you sync your mp4 with itunes called Itunes Agent.
Download here -->
http://ita.sourceforge.net/
It works great and hope this helps the people who like itunes.
It's also simple to use, ITA sets up a playlist in itunes as your mp4 and you just add songs to the playlist then when you have what you want you click sync device.
If you need other info there is plenty on the website.