How to correctly build a Mode2 RoadMap CD?

[Malaspina]

Hi all,
I find I am unable to build a Mode2/Form1 RoadMap CD that my Mk-IV can read. I guess I am missing something and would appreciate any help.
Here are the details:
- I have got some TeleAtlas and NavTech RoadMap CDs image files.
- I observe most images yield a Mode2/Form1 CD when burned
- I burn any of these Mode2 images and my Mk-IV reads them correctly.
- I then take one of the Mode1 image files, and rebuild it as Mode2/Form1
- My Mk-IV displays a “wrong disk” or an eternal “please wait” error message
- I am using Nero Mode2 option and Mode2CDMaker, with same results.
Any ideas?
Regards and TIA

[Scuba]

For the maps Mode is not principal! Maps could be used in Mode 1 even on MK3

Mode2 is principal for software disks for MK3.... on MK4 Mode is not important either for soft disk or for Map disks

[Malaspina]

Thanks Scuba for the information. To be honest, I had no clue about Mode1 RoadMap CDs being readable by Mk-3s.
Still, original RoadMap CDs are obviously issued as Mode2. I am rather of a curious nature, and would like to know why I cant duplicate that.
Cheers.