How to Set Windows Vista as the Default Photo Gallery
- 1). Open Windows Photo Gallery by going to "Start," "All Programs" and then clicking on "Windows Photo Gallery."
- 2). Click on the right-pointing arrow to display the contents of the "Folders" tree in the left navigation pane.
- 3). Click on either the "Pictures" or "Videos" folder to set it as the default photo gallery to display. Next time you open Windows Photo Gallery, the contents of the folder you selected will be displayed instead of everything on your computer.
Source...