Ok, not the best pictures but I'll give it a shot.
The thing circled in red is the stock modulator and the pinkish/purple pointer is pointing to the (10mm I think) bolt or nut. This nut holds an arm down that keeps the base of the modulator in the case of the trans. Un hook the vac hose that runs from your TB to the modulator. Then loosen the nut/bolt that is pointed to. Then you begin to loosen it the arm becomes loose. Once you actually remove the nut/bolt and arm the modulator just pulls right out of the transmission. Pay attention to how the nut/bolt, arm, and modulator are to begin with and put the new modulator back in the same way. The new adjustible modulator will look much smaller in apperance than stock.
On to the pics:
When adjusting the modulator, I'll suggest that you make it feel just slightly firmer than stock and make sure it dosen't bang into Drive.
To adjust you either screw in or un screw a small flat head unside where the vacuum hose goes on.