[Samba] Roaming profiles and accounts

[pierrelaurent@neuf.fr]

Hi all,
I've managed to install an ubuntu server as PDC, everything is working fine.
However, i've got a few questions regarding profile ( M$ XP ) and unix accounts.

1. Roaming profile : I believed that when logging off a computer, user's profile was moved back to the server.  But i can still find one. 
Is there anything to do for the profile not to be stored on pc ?

2. An account must be created for the PC to be added to the domain. ( COMPUTER$ )
   Assuming we have 100 of them, what's the best way to create them automatically ?

Thanks in advance.
Regards,
Pierre