Couldn't find the tut, but found the update:
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*Someone correct me if I'm wrong but...*
1. Place the firmware on the root of your SD card
2. Insert the SD into the Flasher and flip the first two switches down, with all the other switches up.
3. Turn on the console and you should see blue lights as the console boots into the XMB.
4. Turn off the console and this tutorial has come to an end.
5. You can now remove update.bin from your SD.