I am trying to restore to 1.0.2 as part of the 1.1.2 upgrade process. I cant get iTunes to accept my 1.0.2 firmware file i downloaded from apple. It shows up as a folder. Even when i and "_Restore.ipsw" to the end of the filename, it still says a folder, and iTunes wont let me open it when i Option-Click the restore button. Same thing happens when i add ".zip". I have looked around the forums, and i cant find anyone with this issue.

Any advice?