These days, what I would probably do is not follow any one particular tutorial, but instead I'd copy a helper and rename it to Goggle Hook (like in the first link), export the whole model, then use the HeadFixer tool.
I only listed those tutorials as a starting point, there are plenty more when you search the Forums. Here are some additional important threads:
New Head (Zabraak Style) (was: euh...)
miro42's Adding Geometry