This was one of these easiest upgrades! Took under 2 hours to download the image files, about 15 minutes to burn the CD and under 2 minutes to upgrade the OS. And so far based on the improved graphics it appears to be a worthwhile upgrade.

BTW - I have a 2005 4.4i Sport with Nav, DSP and adjustable ride height.

Thanks to X5world and all the members that made this possible.

Cheers!

P.S. - I wish someone would do the same for the Navteq 2005.2 DVD!