User properties and how to make files with a specific group owner

[Andrew Falanga]

Hi,

I've not had to set this up and so far my efforts have proven less than 
successful.  I'm working on a web project with my father and one other 
developer.  I need to have it so that our user id's, when creating files in 
the directory we share the source code in, create the files with the group id 
common to the three of us.  How do I do this?

I thought that it would be that I change the primary group membership from the 
group ID equal to our userid's to the shared group name (in this case www).  
However, this doesn't seem to be doing it.  I've done this on the three of 
our user ids, but when I checked it (checking out files from subversion), all 
of the files were still owned by, in my case, UID=andy and GID=andy.  How do 
I get this to stop working like this and create files with UID=andy GID=www?

Andy