Ok so I have the custom IPSW file created on a Mac.
First I tried to do a DFU then shift restore thru windows it threw a fit.
How do I apply this customer 2.2.1 firmware created by a Mac thru a PC.
Somewhere I read put your phone in restore mode.
Other places I read.
Just hook up your phone then do a Shift restore and pick the custom IPSW file.
Which was is the right way. To apply a custom ipsw created on a Mac.