I solved a problem similar to this by going into the Parallels General Preferences and working with the Keyboard Preferences. For example, I have a habit of using Command + Q to quit programs in general and I want to use that key combo in my VM. The "factory default" maps this combo to Alt + F4. However, on my MacBook Pro, actually pressing Alt +F4 in my XP virtual machine does nothing because I have set up the Mac so that I need to press the "fn" key to use the F keys at the top. I discovered that if I map Command + Q to Alt + "Windows Key" + F4 then it works. From within the VM I can also press Alt + Command + F4 to get the same result.
My conclusion is that the Command key is understood by the virtual machine as the Windows Key but am not 100% certain. Yes, I know that I can set the fn key up in the Mac Preferences so that its behavior is reversed, but I am not about to let the tail wag the dog. Mac preferences and habits prevail.
Last edited: Oct 14, 2010