Creating machine accounts in /etc/passwd?

[<James@jsquared.ca>]

Hello, I've been trying to create a Samba PDC on OpenBSD 3.0.  Using
this link (http://linux.dbw.org/notes/samba_notes.txt) as an example to
work from, it says to run "adduser" and append a $ to the computer name.
 
adduser ntbox$ -M -u 501
 
adduser for OpenBSD does not seem to do the job or understand the -M
option, and 'useradd' does not have a -M either.  I have tried to add
these entries manually, but when I run
 
smbpasswd -a -m ntbox
 
I get the error
 
User blism$ does not exist in system password file (usually
/etc/passwd). Cannot add account without a valid local system user.
 
even though the account is there.
 
Any help would be greatly appreciated.
 
Thank you,
 
James Herschel
JSquared Network Solutions
(905)847-0799
james@jsquared.ca