Thank you for posting this! Most of the available solutions are for Win7 or Vista... took me forever to find this one. But, it works!
One thing I'd add: back up your BCD file before making the above edits, and then make a backup of the new one, too. This edits your boot file, so simply rebooting doesn't take your computer out of test mode.
bcdedit /export c:\BACKUPbcd
Swap between the two by importing the correct one:
bcdedit /import c:\TILEPROXYbcd