Ohhhh man! You know you could have posted this on the 2.2 root guide.and seeing as that thread has a bajillion (500+) posts I bet the answer is in there somewhere. And you aren't very clear about what exactly is going wrong, does it open a window? WHAT EXACTLY IS GOING ON, But anyway, make sure the directory is "c:\froyo\. . ." NOT "c:\froyo\froyo. . ." Sometimes when you unzip it depending on how you do it it won't run. And you should be using windows xp or 7. You gotta have usb debugging on and get into fastboot to run it.