i found it easier to use the dreambox command centre for the ftp side of things. (on this image)
Now browse to /var/bin and copy the zapit file that was included in this zip to the /var/bin directory.
Once the file is copied over you need to change the access rights for the file, If using CuteFTP right click on the file and choose CHMOD / Properties, Set the permissions to 755, click ok to save the changes.
Autoupdate.key - /var/keys
the 6 nagra roms - /var/scce
cables.xml /var/tuxbox/config
Browse to /tmp and copy the addon_mgcamd.bin (included with dm500_nplus_1106Z.img image)
use dcc all the directories are there and its easier to use fr beginners (avail in downloads section)
just do exactly as it says and you can't go wrong