before the new router arrived, I had it set up with a static IP on the DI-624, and tried to do the same with the Actiontec by assigning a static IP to the server's MAC address - which didn't work. It seems that the Actiontec is not seeing the device's MAC address. But I'll give it another try in case something wasn't right the first time.
I haven't been able to get into any settings on the print server box. It's supposed to be possible to telnet in IF there's a route between it and the computer - but of course, adding a route requires knowing the server's IP address .... As far as I've been able to discover, the print server doesn't have a web interface.