Can't find it in any of the options, so i think i'm out of luck.
But maybe someone here will know how to do it.
(or a free program that can do it)
Need to create my dvd file structure so that each item has it's own VTS file system.
Menu's are in VTS_1
Main movie in VTS_2
Special Features in VTS_3
As far as I know, you can't control in DVD Architect.
You need another authoring tool that work on spec layer.
Scenarist would be best decision, but sadly it is not available anymore.
Another idea is to use DVD-lab PRO. It is still available at an affordable price tag.
It can create DDP images, but it sadly can't set CSS!