[trevius]

Why do you need to enter commands without pressing the enter key?

Any command build into the client most likely won't work, as the client will examine what command was issued and decide what to send the server, if anything at all. It doesn't send it directly to the server like a /say message does.

I am not sure what good /cmd would be to you anyway, as I can only guess you are wanting to not need to hit the enter key to save yourself from having to press 1 more button when entering commands. If that isn't the case and all you care about is not needing the enter key for some random reason (I dunno, maybe your enter key is broken :P), then you can always type press ' for say and then the # command, like '#help. You could also do it the long way by typing "/say #help".

If all you are wanting is to save yourself the 1 extra keystroke, then just either buy a keyboard that can have hotkeys programmed into it and set one to do "/say #", so it works no matter what chat you are in, or you can probably download some free 3rd party hotkey app somewhere to do the same thing with your current keyboard and then just set it to something like \ or something.