Can i update in DFU mode using already downloaded ipsw?

January 22, 2013 4:22am CST
hi guys i download a 5.1.1 ipsw using snowbreeze i want to use it in itunes for faster installing can i use that ipsw? or i it update manually into 6.0 ipsw? my device is in a DFU mode because the program error.
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