CREATE GROUP question

Hello all,

Looking at the documentation for 7.3 I see that I can create a group and populate it with users at the same time:

  CREATE GROUP foo WITH USER joe, john, jane;

Looking at the ALTER GROUP and CREATE GROUP documentation I only see "ADD|DROP USER" and "WITH USER" as options,
nothingto do with other groups. 

What I'd like to do is create a group which contains groups.
Can I do that at all? It doesn't look like it according to the documentation, and the question isn't raised. I tried
searchingthe list archives at:  
  http://archives.postgresql.org/search.php
but never got results back as my browser waited forever for ads.area902.com to respond. A quick search on
http://groups.google.comalso didn't find what I was looking for. 

All help is appreciated.

--------------------------
David Olbersen
iGuard Engineer
11415 West Bernardo Court
San Diego, CA 92127
1-858-676-2277 x2152