My MyGig does not play the MP4 from itunes from the harddrive (HDD)
I bought a cable from the dealer that hooks up to the back of the MyGig.
It will allow you to use all the functions of the ipod on the MyGig screen, and will also keep it charged.
I keep my ipod behind my glove box with velcro.
So with other words, I don't even use the harddrive.
I also highly recommend the lockpick for the MyGig. I just got it and I am very happy with it.
BTW, welcome to the forum and when you get a chance, introduce yourself on the forum.
There is a thread on the home page to write in and say hello.