Yes, the "DVD High" map disk is also only used in the E65/E66 MOST iDrive nav system. The rest of the MOST iDrive cars use the "DVD Professional" version of the disk.

Also, note that the Euro cars have a traffic master system that does work with the nav system and has even back to the CD versions of the disks. So, they all use the same hardware. This was based on traffic data broadcast over FM.

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2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input