Many people use the web browser for this. If you have a web server on your local lan, create a web page which displays an image and refreshes every x minutes via <META http-equiv refresh...>.
If you don't have a web server, you can do the same thing by creating HTML files which load images stored on the epods. I posted information on how to do this a long time ago in the epods area on this BBS. Don't have the link handy now.
You will still be stuck with the Browser's menu bar and maybe status bar if you use the browser for this.
Also, you could try to search this BBS for 'resco'. I think they have/had software to do what you want.
