of course it can be done. in multiple ways. separate port 80 traffic and give it a certain speed limit, then the rest of the traffic will never disturb it. you can even give priorities to traffic etc.
is it the same if we use Q tree to make PCQ eith priorities to HTTP ?
and what if we r using web-proxy ? what about the packets go out from the proxy and its port ? someone in this forum said before that : YOU CANT Q PROXY PACKETS !!!