Moving files – Taking ownership of file or folder

So I was asked by a friend to help him with his computer……again. So this time it was a moving of files from one computer to the new one. The old box had Windows XP on it and the new box was of course the dreaded Vista. The problem occured when I took the hard drive out of the old computer and hooked this up as a n USB external device to the new computer the drive would not let me access the contents of the folders. I was logged in as admin on the new machine, but still no go. I did some research and came accross this article on mircosoft’s website which in detail explained the problem and how to fix this. I am sure this would work regardless of how the transfer would have worked ( Vista to XP ?? ), however if not respond and let me know.
Here is the Microsoft article