how can i start playing? :angry:
i can start a game and i have Half-life installed and NS!
::asrifle::
and i dont get any .exe file on the NS

NS is a mod, you start it through HL.exe by adding certain parameters. However the easiest way to start it must be through steam, under Third Party Games.

You'd make a shortcut of the exe, right click on it and go to it's properties. Add "-game "ns"" to the end of the line that for Target.
ex: Target: "C:\Steam\Steam.exe -applaunch 70 -game "ns""

Another possible .exe file is the hl.exe (applicable from 1.6 too. doesn't need hl1 to run ns). Make a shortcut of it and add '-steam -game ns -console' to the end of the target file/folder.