Good morning 🙂
Have you upgraded to CS5 already?
Maybe you want to play with the new features and you would like to use demo assets Adobe used in their presentations. Here is the answer for you. Adobe provided a link people can use to download the demo assets for every Creative Suite 5 product.
There are seperate downloads for Windows and Mac users and you can download demo assets for Photoshop and all the other applications.
You can download Demo Assets from this location. These assets can be used: “for demonstration and testing purposes.” (quote from one of Adobe employees).