Well I hate to say it's as easy as drain the coolant, unbolt everything like manifolds then the head bolts and lift it off, so someone may correct me, but there's not much more to it than that. Is there somethig in particulart that you're struggling with? They're bloody heavy so don't expect it to just come loose and lift off. I'd use an engine crane personally.
It's difficult to know just what to say without much to go on regarding what you're struggling with. There's no secret solution. Drain, unbolt, lift off. Taking the bonnet off helps.