Dear Arjan,
Please follow steps:
2. Unzip it
3. Open vs2008
4. Click "File"==>"Open Website"
5. Point to folder "DotNetgallery\Web" in installation package
6.Click "Open"
7.Right click "Demo.aspx" in "Solution Explorer"
8.Click "View in Browser"
If issue is still existing, keep us known.
Regards,
Eric