Edit/ixb files/format disc MF5 5.0.0189.0 TBYB

[joemet]

MY PROPERTIES:- Small avi & jpg files(own) HL-DT-ST DVD-RW GCA-4080N SP 4:3, do not convert compliant MPEG files, two pass conversion, back to menu. DVD, PAL
1. Can't edit title of video, but can of slideshow
2. Can't find .ixb files in Manual - what are they for?
3. None of the disc writing asks you to use "format disc", so what is Disc Tools/Format Disc for?
4. Can't "exit" from Edit without losing project - forced to "burn" even if no changes made