Create user group in vista basic without the user and group manager window

Hi,

In order to achieve a sql server 2008 tutorial (and more later), I have

to create a new user group.

I'm on vista basic, so I don't have access to the usual user and group

manager window.

I heard there is a way of doing so by the registry...

How can I found this information.

Or if there is another way, what is it ?

I know this is an issue for a lot of people.

Thank you for your time.

--

stephP