You have a MKIII nav computer, but your OS release is very old, probably original to the car. The latest OS available for your computer is 3-1/63, which gives you the split screen view, as well as a few other minor options. Go to this link, and scroll to the bottom. That has instructions on how to do the upgrade yourself, and it has links to the OS CD images that you can download and burn to a CD.

http://www.xoutpost.com/articles/all-...ystem-faq.html

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SOLD
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