GtkTreeStore and GtkTreeIter

[Dennis Morgan <dennis morgan xtra co nz>]

hey eveyone,

This may sound really stupid.
but what is the easiest way to obtain the GtkTreeIter of a newly created
row? 

I have a function which adds 2 or more rows but the second and subsequent rows must be a child of the one 
before..
all the nodes are based on the path to a file..

ie /home /  someuser    / whateva 
    ^             ^                     ^
   parent    child parent      child    

so it looks like:
  /home
      /someuser
            /subdirs 




any ideas would be much appreciated.. 

regards
Dennis