Majority of users are experiencing their firmware downloads in ZIP format. This guide will help you convert that pesky ZIP file into a usable IPSW firmware file.
1. Download the firmware, remember where you have saved the file so you can open the folder later.
note: I suggest not saving it to desktop
2. Open up Windows Explorers (Start>Programs>Accessories)
3. Once Windows Explorer is up and running, click on "Tools" and select "Folder Options..."
4. At the top tabs, click on "View" and you should see "Advanced settings:". Inside this box there a many options which you can tick and untick. You will need to find "Hide extensions for known file tyes" and untick it to show the extension.
5. Once you have that done, open the folder where you have saved your firmware and change ONLY the extension. eg .zip > .ipsw
6. YOUR DONE! You can restore the viewing options in Windows Explorer or you can leave it as is.
I will be working on a Vista guide later as well, hold on tight!
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