Lan setup
We keep it simple. Everyone that jumps in on the game is running with a fixed IP. Typically 192.68.25.xxx subnet mask is of course 255.255.255.0
*NO GATEWAY* I cannot stress that one enough. There's no need to route outside the LAN during gaming.
All machines have client for ms networks with file/printer sharing service and tcpip is the only protocol. We often need to get all our maps and etc shared and dumped to everyone and that's the only reason for the service.
Server is usually whoevers box has the most horsepower.. Config, skins, mutators and maps all vary by whet we want to play for the session. Server and clients all run patch 428. No machines run any kind of winsock proxy clients of any kind to include MS WSP2.0, ISA firewall client, ICS, wingate, nothing.
Clean networking setup with no funny biz. We've never had a problem until the v432 came along. Then the skins and mods cause UT to just endtask and we're looking at desktop screens again. We ran 432 w/limited success with just the stock install and bonus pack. No other skins or mods (yawn). We could add maps all day, but any mod or skin package added anywhere fired up the crashomatic.
If I can help you out with your net settings, I'd be happy to. Just holler.