I jail broke my iPhone ages ago with spirit, since then I mistakenly uograded to 4.0, I believe there is a downgrade to 3.2 then I can jailbreak again on 4.0. I tried this today and apparently I have to change a file name In The 'etc' folder in windows. The problem is the pc won't let me change it and says I need to be administrator of which I am. Is there any help out there. I am a Mac and pc user so any jailbreak would be appreciated.