Hello all ... i'm still new in linux networking ...

my office use mandriva 2005 w/ samba as the file server and all client using win Xp to access the shared folder on that server

I need your help about these matter :
1. how to config mandrake/samba to detect file deletion on samba server.
2. how to set access right to samba user, so the user can only create/modify file and can't delete the existing files

Thanks in advance..