[Samba] How to give more rights to users ?

[Olivier BONHOMME]

Hello Everybody,

I've just finished to install a SAMBA domain with LDAP authentication. 
All works fine :). The clients runs Windows 2000 Pro or Windows XP. The 
problem is that a simple user can't install or modify some system 
parameters and in my office it's needed by some users. So I would like 
to know how to give these rights to users logged in the domain on their 
local system ?

Thank you for your answers

Best Regards,
Olivier BONHOMME