But from what I'm reading, something happens that 'prepares' your phone to accept the custom non-apple firmware to begin with.
Just putting your virgin phone in DFU will not make it take a custom ipsw unless you 'pwn' it first right?
I'm wondering about that 'pwn' process?
I think the OP is referring to the step of Pwning iTunes, where you basically changed a setting in iTunes that would allow it to restore a custom firmware. Without pwning iTunes first iTunes wouldn't allow the custom firmware.