Authentication from NT

[domdev]

Hi,
I want to use my Linux box as a file server but the thing i want to do
is not create users under Linux but to authenticate them from NT PDC.
What i want is a group level access if user belongs to a particular
group (under NT) he can access that particular group folder.
Can i perform this sort of mapping?
just create one Master User  for each group and when a user for
particular group try to log in after authenticate from  NT that group's
Master UID assigned to him.
Or there is any other good way to do this?

Thanks.