Those don’t tell you how to flash the BIOS though.
"You'll have to locate the Write Protect jumper and enable it."
But it gives you absolutely no clue where the write-protect jumper is, or how to find it. For this critical step, you are on your own.
It's pretty clear that Google really doesn't want people doing this. (Not that I blame them. But still, the OP page does add quite a bit of value IMHO.)