So local powershell commands is not enough.
To launch a powershell command on a remote computer is quite easy.
icm hostname {powershell-command}
However the remote system needs to be configured to allow this to occur.
First check to see if the winrm is running
get-service winrm
If not you might need to config
Enable-PSRemoting –force
References
http://technet.microsoft.com/en-us/magazine/ff700227.aspx
