I get the same message when trying to install Pluto. I've two NICs, one onboard (SiS I think)and a Realtek card. The install sees both of them and asks me to choose one. Regardless of which one I choose I get the error.
i.e"Network autoconfiguration failed Your network is probably not using the DHCP protocol"
If I choose the "Don't configure networking" option and carry on, Pluto installs, but won't load completely. It hangs at "Loading DCERouter"
However, if I connect the machine to an ADSL modem (which has it's own DHCP inbuilt) Pluto installs and starts perfectly.
Thinking I'd got around the error, I then connected it to a network switch along with another machine, but it is not accessible from the other machine on the network switch?
I'm going to try installing a diskless media director to see if that starts DHCP and also check the BIOS for non-PnP settings tonight.
I hope it works, I'm dying to get this thing going.