The tutorial is right there
http://nyansatan.github.io/dualboot Install iOS 6 for iPhone 5 filesystem, and for boot components do it all normally for 5c 7.0 other than kernel which you use ios 6 one and RET panic
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http://nyansatan.github.io/dualboot Install iOS 6 for iPhone 5 filesystem, and for boot components do it all normally for 5c 7.0 other than kernel which you use ios 6 one and RET panic