Yesterday I installed both files to my n900. Today I have tried the phone with my car ("new" Skoda Octavia with built-in "Bolero" type radio/CD player and BT car kit).
The car could download my telephone book and I can use it. Very good think!

In case of missed calls/incoming calls/ dialed numbers there is a small "bug"; the car displays names "randomly" from my telephone book, which are not the same, what I can see in my phone call history.

Did I make something wrong?