http://www.2shared.com/file/jY1OiWWb/CF-Root.html.
Go to recovery, plug phone in, dump that on there then flash it. I'm guessing it should work, it's the zip from another kernel, I just swapped zImages out, I have no idea how to make them properly
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If it doesn't work, just flash back to GB and start again.
And just to make sure that I don't balls it up, am I hitting "apply update from zip" or "install zip from SD card"?
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. These Macs think they're too clever for their own good.