Nero 7 Vision 4 false representation, unexpected behaviour: region set, frames drop

Hello!
Will region 5 DVD players playback region 1 DVD-videos, created in the Nero 7 Vision 4? How to turn off the region 1 mark in the Nero 7 Vision 4? How to prevent a frames drop every second in a progressive scan PAL DVD-video, created in the Nero 7 Vision 4 from a prossibly interlaced scan NTSC video file? How to prevent 5.1 audio downmix to 2 channels in “Automatic” quality mode in the Nero 7 Vision 4?
Why does not www.nero.com has a forum?
How to prevend a disk eject after a burn?
Best regards,
Dima