Sorry about the delay. Here's a pic of how I do it.
At the bottom of the ice bucket of there's an aquarium pump like this
. Start off with a big bag's worth of ice (I use my freezer and accumulate a big bag over the week leading up to brew day). For the first 10 minutes or so (of a 5 gallon batch) I don't return the hot water from the IC to the ice bucket--I direct that into another bucket or my mash tun for cleaning. After that 10 minutes (or whenever the water returning from the IC is about 120 or so) I start returning to the ice.
I've built several CFCs and used the heck out of them. They're nice, but this is nicer. You cool the whole wort down much quicker than you would with a CFC. With a CFC you'd be leaving a big amount of your wort at near boiling temps for a long time.
some great info on this.