Managed Preferences: Managing Ical, Mail, Adresbook settings and Bookmarks

For a while i have been trying to get all my managed preferences right but at the moment just the mail preferences worked out, see: http://localhostr.com/files/45de41/Schermafbeelding+2010-07-04+om+11.06.12.png.

When i try to configure ical it does not work and adresbook does not even show up (how can i set up the account automaticly for network users on more than 1 system than?)

I also would like to know how i can add some bookmarks to Safari for users by using managed preferences!

Is there anyone here that knows how to:
Set up ical using managed preferences
Set up adresbook using managed preferences
Add bookmarks to safari using managed preferences
Change the OS language of the client