I read it in the FAQ that if u change the Advance Video Arrange Method in TMPGEnc to No Margin (keep aspect ratio), TMPGEnd will cut left and right, and make it full screen.
I tried it, but it didn't work. It looks slightly taller than the widescreen, but it's not fullscreen. Does anyone have any clue what's going on?

Also, I would like to know more about the source aspect ratio, and video arrange method. I use 16:9 Display, and no margin (keep aspect ratio). What does that really mean?
Any comments or links would be helpful. Thanks!