Looks pretty suspicious or a joke. Having a hard drive with 400 million dollars, instead of finding the best masters in reality, he goes to the forum to ask... Are you the author? gkelly 15Z5YJaaNSxeynvr6uW6jQZLwq3n1Hu6RX https://bitcointalk.org/index.php?topic=24346.0 Make a complete copy of the hard disk (image) and upload it here and we'll see what you can do 
Just tell me please if you were in the same situation, caan you trust someone with your hard drive ?
I have done lot of research (ur shit reality), All of them are saying keep the hard drive for check and come back later !! lol like dealing with an idiot.
So you have a wallet.dat file but you say it is corrupted. In what way? How do you know it's corrupted?
Personally I would try to get the disk recovered and make a clone of it.
Next woudl be to look at teh wallet.dat and see how it is corrupted. In what way. There might be parts that can be repaired.
I can also help you with this.