That video was a hack for the K4, and the comments posted for it showed various people had problems with it. Many people here have had problems with that method as well on a K4. You tried it on a PW, which is not the same.
Were you actually able to get into the diags menu? Did you rename your 800x600 screensavers folder as shown in the video?
You really show undo your changes. Rename the original 800x600 folder back after deleting the symlink.
Can you see your PW as a USB device from your host PC?
Some of your described behavior seems inconsistent with how I understand the behavior of a PW. What firmware version do you have on it?
Last edited by geekmaster; 01-11-2013 at 10:58 PM.