If your Netscape fails to display the picture, try to set Helper Application for the following Content-types :
image/jpeg
multipart/x-mixed-replace
video/mpeg
video/cellb
How to do :
From the menu bar, select menus: "Options" -> "General Preferences"
From the menus of "General Preferences", select "Helper"
For each Content-type mentioned above, set the Netscape itself as Helper Application.
(By clicking "Edit" or "New", open the following window and set.)