[A-l-l-a-n-o-n]

Originally Posted by DanielG

What you need is DVD authoring software. DVDStyler is a freeware authoring tool that can combine multiple DVDs into 1 disc.

http://www.dvdstyler.org

You will most likely lose any menus, but I haven't used this software in a while so maybe the menus could be retained. This software has even been translated into German which will make it easier for you to use.

Thanks a lot for your answer.
I will try it out

Greetings