I presume that you are trying to extract the patch files into C:\Program Files\PlaneShift Crystal Blue. But instead of moving the patch files there, try moving them into another directory first. Try putting them in another drive, D: or F: if you have one, or if you have been trying these instead of C:, try C:. Maybe try moving them into My Documents if nothing else is available. And then if you no longer get the password prompt, just move the files where they belong - in your PlaneShift folder.