I have little information about this. Also this kind of navigation software is completely new to me
Now i am told the Eastern Europe DVD in this set is 2008.1 while West Europe is 2009-2010. Sorry, this info is new to me as well.
I am also told no code is necessary. Installation is like this :
1. Unpack using WinRar, no other unpack software!
2. burn an ISO file with ImgBurn.
3. for Eastern European use single layer DVD, for Western Europe a DVD-R DL.
4. write the DVD as slow as possiible, advised speed 2x.
5. These DVD seem to work on more original car GPS or afterwards fitted in systems, compatible or likewise to Dayton. Depending on the brand you may need to update the firmware of your navigation system.