samba - Jan 2003 - How to map the Unix groups to NT domain groups?

Hi all,

I'm quite new to Samba and I'm trying to setup a logon script which maps
"Windows" drives to Samba shares.

Now the problem is to detect if the current user is member of a specific 
Unix group to decide to execute a map or not.

Server: Samba 2.2.5 on Suse Linux 8.1
Client: Win2k SP3

Where to find information about this subject?

BR, Jacques-D.