Unfortunately, the Resource Kit info is Win NT4/2K version specific.

Here is a quick guide:

1. On your NT4 Domain Controller, right click on 'My Computer', then
select the tab labelled 'User Profiles'.

2. Select a user profile you want to migrate and click on it.

Note: I am using the term "migrate" lossely. You can copy a profile to
create a group profile. You can give the user 'Everyone' rights to the
profile you copy this to. That is what you need to do, since your samba
domain is not a member of a trust relationship with your NT4 PDC.

3. Click the 'Copy To' button.

4. In the box labelled 'Copy Profile to' add your new path, eg:
c:\temp\foobar

5. Click on the button labelled 'Change' in the "Permitted to use" box.

6. Click on the group 'Everyone' and then click OK. This closes the
'chose user' box.

7. Now click OK.

Follow the above for every profile you need to migrate.


Side bar Notes:
---------------
You should obtain the SID of your NT4 domain. You can use smbpasswd to do
this. Read the man page.

With Samba-3.0.0 alpha code you can import all you NT4 domain accounts
using the net samsync method. This way you can retain your profile
settings as well as all your users.

Also Note:
----------
The above method can be used to create mandatory profiles also. To convert
a group profile into a mandatory profile simply locate the NTUser.DAT file
in the copied profile and rename it to NTUser.MAN.


Next Note:
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The W2K professional resource kit has moveuser.exe:

Description:

   moveuser.exe changes the security of a profile from one user to another.
   This allows the account domain to change, and/or the user name to change.