After many (MANY!) hours of trying to get my iPhone back to the 1.1.4 firmware unsuccessfully, I finally found out how!
How I got here: I upgraded my iPhone to the 1.2.0 firmware without hacking the 1.1.4 firmware first. As such, the phone was now useless, so I needed to find out how to get back to 1.1.4. Given that the 1.2.0 firmware was only released today, there were no articles instructing me how to do so, and there were no applications to perform the task for me.
So, what was the problem: well, after much investigation it seems like the problem lay with iTunes 7.7 and the Apple Mobile Device Support. Any time I tried to restore the 1.1.4 ipsw, there were errors (mainly 1601/1602). After completely rolling back iTunes, Apple Mobile Device Support, Apple Software Update and QuickTime, rebooting and reinstalling iTunes 7.6, I was now able to put the phone into DFU mode and use the Restore (Shift+Restore in fact) function to restore the 1.1.4 firmware ipsw successfully.
Hope this saves someone hours of searching and trial and error!
Good words.
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