Does anyone understand these new video options?

I'm talking pretty much everything Sony added in the update

Particularly, I do not understand the DVD upscaling part... is Double Scale better than Full Screen? Which are we supposed to pick (If we have an HDTV).

What the heck is Y Pb/Cb Pr/Cr Super-White (HDMI)? On the firmware page it says that <- but, I thought that pb/cb blah blah was for Component cables. Isn't it?

And how am I supposed to know if my tv supports "RGB Full Range (HDMI)"?

They went way over my head with this firmware update. I want to watch a DVD to see how it looks, so I wanted to get my settings correct...