Using someone else's custom .ipsw??
I don't have a mac and therefore can't use Pwnage Tool. I want to upgrade to 2.2 without upgrading my baseband (still running the original 2.01).
Can I just take an ipsw that someone else created with Pwnage Tool and apply to my phone using iTunes? Or is the ipsw made specifically for one phone?
Otherwise what are my options, if any? I have absolutely no access to a Mac, I don't even know anyone that owns one. I guess I could emulate Mac OSX, but then who knows if the USB control will be stable enough. Don't wanna risk screwing up the phone due to communication error or something.