Unfortunately there is a bug in 3.00 alpha 11, Receiver Edition only, such that it doesn't do this -- it doesn't adequately randomise the xid on boot, so two Receiver Edition car-players on the same network both get the same xid, and thus any attempt by the DHCP server to assign an IP address to either one of them, is actioned by both, so both get the same IP address. Which is bad.