Drain coolant. Disconnect battery. Remove valve cover. Remove connections to intake manifold. Remove exhaust manifold. Unbolt head, lift and remove. Remove head gasket. Either fix or replace head. Installation is reverse of removal.

It is very self explanatory as you go. I would look at the head gasket as the most likely suspect, because white smoke indicates coolant. Does the smoke smell sweet? Does the oil look like chocolate milk?

Edit: damnit barefoot, are we just gonna alternate threads or what?