To completely disable ipv6 and the Teredo interface:
reg add "HKLM\SYSTEM\CurrentControlSet\services\Tcpip6\Parameters" /v DisabledComponents /t REG_DWORD /d "255" /f
“255” decimal stands for 0×000000ff hexadecimal.
However, this isn’t listed here: http://support.microsoft.com/kb/929852/. Nonetheless this setting suits my needs best.