Don't matter. Just go with default custom settings. If its not a panny, then just turn contrast all the way up and brightness around the midpoint. The other settings are moot when it comes to aging the panel with the slides.
Note that that is just for the slides. When watching TV, use normal settings (whatever you get with a disc like Disney WoW, or use settings people posted on here for your model). You want contrast at normal calibrated levels for normal watching, just all the way up on the slides to help age the phosphors faster.
To the second post, it just means the TV needs a photo viewer app with an endless slide show with no logos on the screen. The 2012 Panny's have that by default. Just set the interval to slow and start the slide show in the picture viewer. It will run endlessly until you stop it manually.
Again, just assuming you have a 2012 Panny. If you want more specific instructions you need to post the make and model of your tv.