[Samba] local users in a domain...

[Christ Schlacta]

so I have some local users that I'd like to show up in my samba domain a 
bit more properly, but it's infeasable to add their accounts to the ldap 
directory proper.

I've tried to create an idmap entry (probably wrong) and a structural 
SID with a sam account pointing to the numeric UID and a proper name for 
the unix account, but it still shows up as UNIX-USER/accountname.  what 
am I in need of doing to make this show up as a user in the domain short 
of adding an actual user for it?