gtktreeview with expanded row

[Hubert Sokołowski <who_ami o2 pl>]

hi!

I have a list of users in some groups like this

-^group1
   user1
   user2
->group2
-^group3
   user6

I want to add special row for every user with description.
so it will look like that

-^group1
   user1
     desc1
   user2
     desc2

but I want the rows with descriptions to be always expanded when I expand
groups and with arrows unvisible in the rows with users names.
also I want them to be unselectable.

please help, because I don't have clue how to do that.

thanks in advance
hs