Not urgent but curious/ adding non dvd content like PDF

So far I have been doing relatively simple projects in DVDSP. Got a client now that wants the DVD to have a separate section on the disk that holds PDF files, powerpoint presentations, etc. which customers can download or open and run from the DVD on their computer.

For example, after watching a safety training video on the DVD as you would normally, they want to be able to drop the DVD into a computer and use a windows or mac file browser to find a section on the disk with PDF files on it, open and print out a poster related to the program they just saw. Just like the DVD was a CD-Rom. Or forms, or anything else they want the viewer to have as physical media on hand while watching the DVD portion. I don't need to make the PDF playable as video or slide shows or anything, we just want to stash some user-printable content in a separate section of the authored disk, because people lose the hard copy of papers shipped with disks all the time, etc.

I only got a cursory training on how to do that kind of partitioning of the DVD in this manner, and never got to use the info until today, so I forgot it. Hard to find it in the manual or help files if you can't adequately describe it.

Can someone give me the basics for how to go about that, assuming I know how to make the rest of a DVDSP project?
Thanks!