Hi
Further to above...
If you create a video with VP and set bookmarks and export that project from VP using the Video DVD option. You get the choice as to whether you want the bookmarks to act as chapters. Responding "YES" to this option allows the resulting DVD to step to each bookmarked point with the skip button on a suitable DVD player. i.e. chapters are created. The names you set for the bookmarks are not used except during editing.
If you want to use Express Burn to create a DVD with multiple projects and you export your project(s) with their bookmarks to your PC as a video file..e.g. as mpeg4 for example the "Chapters" are not apparently saved.
Express Burn however will create a list of included Videos (see above post) to to be burnt to the DVD you can click on any of these and re-create new chapters using the "Manage Chapters" button. (This seems a bit of a backward step as you may have set many during editing ....it involves playing or jumping through the video and adding markers again where required....Your original bookmarked positions do not appear )
Express Burn will load a pre-saved list of chapter positions although I haven't found how that can be created yet. The option does not seem to be present in VP.
Nat