Download sysinternal's pstools. It contains psexec. This will let you execute commands remotely (but you'll need administrator privileges on the remote machine). Best thing is it's free and nothing needs to be installed on the remote machine.

Example:
Code:
psexec \\remotemachine cmd
This will open a remote command shell. Be carefull though! Some commands don't like the way the input/output got redirected and will choke. A good example is the commandline ftp client.