Log on locally as a local administrator. In the Network tool of Control Panel, select Change and enter a Workgroup name, leaving the domain. Restart the computer and log on locally as a local administrator.
Now you can go to RegEdit in Run, and connect to your remote computer and do your stuff.
Just sharing some hacks I used for a logon script that I created for Internet explorer. Most of the hacks were using registry key, which is pretty simple as long as you know where the keys are.
Setup Wifi Hotspot on your laptop is ever so easy, only a couple of steps, all your laptops, smart phones and tablets can share the same internet connection, and it costs nothing.