No One lives Forever's stand-alone server application has an annoying bug. The pop-up menu used to select the game type, either Deathmatch or HARM vs. UNITY, is backwards. If you select Deathmatch out of the pop-up menu a HARM vs. UNITY server is created. And when HARM vs. UNITY is selected you will create a Deathmatch server.
This simple patch re-aligns the pop-up menu's index items so that Deathmatch will give a Deathmatch server and HARM vs. UNITY will give a HARM vs. UNITY server.