Navigando qua e la ho trovato queste chiavi di registro...
forse qualcuno sa cosa farne... pare che siano da personalizzare...

[code]
[HKEY_CLASSES_ROOT\.art\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}"

[HKEY_CLASSES_ROOT\.bmp\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}"

[HKEY_CLASSES_ROOT\.dib\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}"

[HKEY_CLASSES_ROOT\.gif\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}"

[HKEY_CLASSES_ROOT\.jfif\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}"

[HKEY_CLASSES_ROOT\.jpe\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}"

[HKEY_CLASSES_ROOT\.jpeg\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}"
codice:
[HKEY_CLASSES_ROOT\.jpg\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}] 
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}" 

[HKEY_CLASSES_ROOT\.png\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}] 
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}" 

[HKEY_CLASSES_ROOT\.wmf\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}] 
@="{7376D660-C583-11d0-A3A5-00C04FD706EC}" 

[HKEY_CLASSES_ROOT\.tif\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}] 
@="{1AEB1360-5AFC-11D0-B806-00C04FD706EC}" 

[HKEY_CLASSES_ROOT\.tiff\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}] 
@="{1AEB1360-5AFC-11D0-B806-00C04FD706EC}"