Here is a set of batch files you can use to install/uninstall and start/stop NwNX as a Windows Service. You can also just fire off the Run.bat manually for a quick test.
1) Extract to NwNX4 directory
2) After running ServiceInstall.bat, Under Windows' Services, be sure to set the User and Password to run it as well as the Startup type which defaults to Manual.
[2010-02-20]
* It seems I uploaded the wrong zip file; sorry about that.
10 - A Masterpiece, Genuinely Groundbreaking 9 - Outstanding, a Must Have 8 - Excellent, Recommended to Anyone 7 - Very Good, Deserves a Look 6 - Good, Qualified Recommendation 5 - Fair, Solid yet Unremarkable 4 - Some Merit, Requires Improvements 3 - Poor Execution, Potential Unrealized 2 - Very Little Appeal 1 - Not Recommended to Anyone