[Samba] Laptop and local vs roaming profiles/users

[Mi]

Hello,

When a notebook joins a domain, it creates a new (roaming) profile for 
the domain user. XP sees this user (Domain\User) as someone different 
from the local user (Hostname\User) which existed before.

Is there a way to reconcile these two personalities, while keeping the 
profile as roaming, so the user can both use different computers in the 
domain with his roaming profile, and also use the laptop when not 
connected to the domain?

Thanks,

Mi