You can download the remote debugger component at:
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27540
In order to connect you need to:
- Run the debugger agent on the remote machine
- Be able to create an IP connection (wireless will work but isn't going to be as responsive/reliable as ethernet)
- Have permissions on the remote machine (windows auth etc.)
If you have the Windows Developer Preview the agent is already installed and is on the start screen (search for "Remote Debugger").