Looking at "External Adapter 1", I'm configured manually (no DHCP):
IP: 192.168.1.8
Subnet Mask: 255.255.255.0
GW: 192.168.1.254
DNS: 192.168.1.100 / 192.168.1.100
Use this adapter for internet lookup is checked.

For anyone that can view tcpdump files (freeware Ethereal can), I've attached the network trace of my machine trying to connect to the Central via emplode. My machine is .1, the central is .8. Interestingly, the Central did a lookup for production-2.replaytv.net, is that normal? BTW, I checked, and my replaytv is 192.168.1.9.