To the best of my knowledge, you can not copy music files back to itunes or limewire from an ipod.
I have previously read a thread about recovering deleted files with software and in fact did downlaoad a free copy which found most of my deleted files. The problem was that the free software will not allow you to recover files over a certain size. They want you to buy the better version.
I was just hoping that someone might know where these deleted files were stored on the C drive and how to restore them.