[Samba] Problems with 2 server and 2 domains

[Robert Rati]

I am trying to set up a windows Domain with Samba 2.2.8a and 2.2.7 on 
Debian and Redhat systems (respectively).  This network has two subnets, 
so I have a samba server for each subnet, and they are configured to 
pass netbios traffic to each other so both networks can be seen in 
network neighborhood.  I'm trying to expand this setup and create a 
windows Domain that will work like this:

Two samba servers, A and B, that control users that log on to the PCs on 
the domain.  Each server has half of the users on it along with their 
roaming profile and home directory.  If a user whose account information 
is located on server A logs into a machine in subnet A (which is 
controlled by server A), then server A authenticates the user and serves 
up his profile and home directory to be mapped.  If the user logs into 
subnet B (controlled by server B), then server B uses server A for 
authentication and the users profile and home directory are served from 
server A.  Same thing for a user on server B.

I thought this could be accomplished by setting "security = server" and 
setting server A as a "password server" in server B's configuration file 
(and vice versa for server A), but that doesn't seem to work.  In fact, 
I can't get server B to use server A to authenticate even if server A is 
using "security = user" and server B is using "security = server".

I can see how this could be done with multiple NFS mounts on servers 
(each mouthing the other's user's directories), but that seems really 
messy and I don't think it would allow for the users to easily maintain 
their passwords (they'd have to change their password on each server as 
all users would have to exist on each server).

Is what I'm trying to do possible?  Can someone help me figure out what 
I'm doing wrong?  Any help would be much appreciated.

Rob