Hi Sander,
You can accomplish this by adding a managed application with the following contents:
| Name: | Windows Photo Viewer |
| Description: | Windows Photo Viewer |
| Commandline: | %windir%\system32\rundll32.exe |
| Working directory: | %windir%\system32 |
| Parameters: | %windir%\system32\shimgvw.dll,ImageView_Fullscreen |
| Icon: | Some icon |
Next thing is to define the file type associations you want to use.
This enables the "Windows Photo Viewer" as an managed application.
Note 1: For Windows XP this enables "Windows Picture and Fax viewer".
For Windows 7 this enables "Windows Photo Viewer".
Note 2: You should make the application hidden as it only runned by clicking on a picture.
Joost