I'm pretty sure it's straight-forward.
Take off all your intake hodgepodge, then take off the throttle body, then take off the "Y" pipe, then take off the upper intake manifold, then take off the lower.
Pull out the rail and injectors and your done?
Or is this to simplified and you want more detailed instructions? If that's the case, then I suggest you get a handy dandy 2JZ-GE manual.