[Samba] Internet Explorer

[Richard K Ssekibuule]

I have successfully setup a samba 2.25 PDC on SuSE8.1 for my 700 users.
My problem: These users cannot change their Internet explorer proxy setting. 

Question: How can I grant rights to change Internet explorer settings 
without compromising administrative security? 

My kernel cannot do transparent proxy, but I use squid to schedule users 
Internet access.
The server running squid is different from the one running squid/gateway. 

Thanks in advance. 

Richard.