samba - Feb 2004 - Changing NTFS and Share permissions

Hi,
   I was wondering if it was possible for a normal windows user to change 
permissions or create a share on a Samba server.  I did read somethibng 
about nt acl support is this on by default ?  I've tried changing 
permissions (Samba 3.x) but they just seem to reset back to the original 
values.

Thank's in advance.

Regards,
       Frank