I powered through a large portion of Nancy Drew: Curse of Blackmoor Manor (DVD) yesterday.
It's an interesting game. They made a number of changes for the DVD version, the most obvious of which is moving around. In the PC version, you just click left and right, and it takes you to a different screen. In the DVD version, you move left and right, and a short scene of Nancy walking to the new area plays.
For example, if you're going down the stairs of the main hall, the camera moves down the steps. It looks like you're actually seeing things from Nancy's point of view, when she moves around. There are a few areas where this results in you seeing things which were offscreen in the PC game, such as the ceilings, floors and backsides of things in Blackmoor.
Some of the puzzles have been removed, and others have been simplified. I was most interested in the puzzles that were completely changed, such as Jane's card matching puzzle and the thirteen ghosts puzzle. That's right! The thirteen ghosts are in completely different locations in this game! It was rather fun, finding all the newly-hidden ghosts.
...Then I got to the point where I was missing four ghosts, and it turned out that I had to check every single coat of arms to find them. That got kind of boring, because 75% of the coat of arms didn't have ghosts.
I promised to do a video walkthrough for this game, and I intend to keep my promise! ...Just as soon as I figure out how to record DVD footage.