Changing Screen saver on DVD player?

:stuck_out_tongue: Morning

Just found this site on a google search and so Ive joined up.
My search began looking for ways to replace screen savers on DVD players.
I own two CyberHome CH-DVD 400 for video art installations. I found them to be fantastic value, however I noticed from an old thread that it may be possible to upload the ‘Firmware’?? with an alternative image from disk. Any ideas on this subject would be gratefully received. Zoido.