Really appreciate the effort you're putting in for the underprivileged. This is a similar sort of set up I prepared last month but without the CD ROM thingy. I prepared a scripted build for two servers (master and slave) . Master and Slave running ldap and users are also created on ldap. Both these servers run named, ldap, squid, mrtg, snmp, traps when system is underperforming etc etc and all on a scripted build.
For the client machines, I have a script to create a scaled down kiosk model running KDE. PAM auth is enabled on these machines. ldap.conf contains info to autheticate against the master and then let them in. This achieves the "domain kinda auth". Once authenticated they get the NFS share/username as the home directory. The clients cannot get shell access and other features as I've disabled it.
Automount may do it .. check this out
http://lists.suse.com/archive/suse-l...-Feb/0864.html
Let us know if you need help and we would be happy to help.
Once again .. keep up the good work.