NIS+LDAP Authentication + /home directories

[cron0]

I have a server that acts as a LDAP/NIS authentication server. Clients running FedoraCore (or another distro) uses the LDAP server to authenticate their logins.

What I would like to do is store every /home directories on my server and each time a client would login it would mount that directory (using NFS or something else..) into their local /home.

I suppose a login script could do that each time a user logs in, but I can't figure out what and where is that script.

Any ideas?