My brother did one when his Cisco PIX firewall failed. The Cisco PIX firewall started up again at a later moment though, turned out to be something else causing the problem (he didn't really care at the time as he wanted to lern something new so he never investigated further into the problem)
I thought about messing around with IPCcop, but never got around to it.
I will load it onto WMware and see what it is like! Thanks for the "tip"
