Sure. (I'm on W7, btw, in case that has anything to do with it...)
If I open a command prompt, I have no trouble running nircmd from anywhere, so I'm sure it's in my PATH, but if I open FARR (I'm using Alt-Space) and type 'cmd ', all I get are file hits. For example, the first hit is a file called 'vimcmds.txt' which is a cheat sheet I keep of Vim commands I want to remember.