greenland46:

Thanks for the tips, I didn't know the workarounds for importing VOB files in Pinnacle Studio 9.4.3.

If you use File / Import DVD Titles, does it convert it to another encoding (a potential loss of quality) or keep it the same?

I haven't tried it yet, but it sounds like you can import VOB files directly from a DVD.

I know that on a DVD there are multiple VOB files. Do you know why they split up the content in different VOB files? Is it a size limitation or something else?

Presumably to get all content (except menus of course) from a DVD into Pinnacle Studio 9.4.3 you would have to import all VOB files and concatenate them in a project to create a movie with the same content. An interesting experiment!