Yes, I have a process called DarkRadiant.exe in the task monitor, its using about 50 CPU and 1 872 kB of memory. It was installed to c:\Program Files\DarkRadiant. The DarkMod is in c:\Program Files\DOOM 3\darkmod\ and is running properly. Isnt there problem with location of the folders? I have read the quick installation guide on the wiki, it seem that I have done everything properly..