Combine two DVD's into one

When you want to combine two DVD's onto one disc, but keep the chapters, then try the following steps. I assume the video_ts folders of both DVD's are already available on your harddrive.

In most cases there is no vob file per chapter, but each vob file is filled to its maximum (1GB) and then a new one is created. Sometimes, however, there is a vob file per chapter. In this case, you only need to follow the steps following DVDStyler:

• Download and install DVDShrink (freeware)
• Start DVDShrink and click "Reauthor"
• In the right pane under "dvd browser", navigate to the video_ts folder of the first DVD
• Drag the desired chapters to the left
• In the right pane under "dvd browser", navigate to the video_ts folder of the second DVD
• Drag the desired chapters to the left
• Under File, click "Backup" and save to folder c:\shrink. This set automagically creates a vob file per chapter!
• Download and install DVDStyler (freeware)
• Start DVDStyler and add all .vob files from c:\shrink to the current project. The DVD main- and chapter menu's are created automatically 
• Optionally: add the names of the chapters to the chapter menus
• Burn the project to an iso file or directly to disc

Ofcourse, you can only do this with homemade DVD's or to DVD's you own legally and when local law permits it.