How to set GUEST mode for Microsoft ActiveSync and WMDC 6.x

For those times when you don’t want a PC to try to establish a partnership with your Windows Mobile device, you can use this registry file:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows CE Services]
"GuestOnly"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows CE Services]
"Sync window display mode"=dword:00000000

Update 28 July 2009:
As msalvai comments below, it may not work with WMDC.  I’ve had mixed results myself.  I’m going to do some further research to find out if it REALLY works or not.

On this day..

• "It's not what you see that counts, it's what you know is there" - 2010
• I could just grab a scalpel ... - 2007