As I see more and more folks considering, and accomplishing the Stealth base model or ES to 3000gt conversion it has come to my mind to do an entire write-up on the process for FAQ and as an estimate for prospective conversion doers as to how much work is involved. I will be illustrating it with pix of my own conversion but may ask for conversion pix from other conversion'ers. If anyone has any comments additions etc please post 
So, lets get started.
Alright we shall run from the back to the front of the car in the removal stage.
Step #1. TAIL LIGHT REMOVAL. To do this you must remove the nuts on the inside of the trunk. The tail lights must be removed FIRST before the center garnish can be removed. There are 2 nuts holding each light in place. (see below for location)
Remove these bolts from the inside of the trunk and the light will slide out. Now rotate and remove each bulb from the light and remove the light.
*note* if you wish to remove the bulb and wiring assembly, you must go inside the trunk and unplug the harness, then it will simply slide out. If converting to 3000gt tail lights there is no need to take the bulb wire assemply out.
For further help on the tail lights, at the end of the first video available at the 3S PowerHour site there is a tutorial on how to do so.
Welcome to 3SiDIY.com!
Step #2 CENTER GARNISH REMOVAL. To remove the center garnish, it is the same as the tail lights, just simply take each nut off from the inside of the trunk. there are 8 nuts to be taken off. (see below for locations)
remove these nuts from the inside of the trunk and the center ganrish shall slide out straight backwards.
Step #3 REAR QUARTER PANEL EXTENSION REMOVAL. These are the small light housings attached to the quarter panel. To remove, first unbolt the support bracket. (see below/ red arrows)
next, unscrew the screws holding it in place to the trunk area (see above/ green arrows). Now it will slide out horizontally.
Step #4 LICENSE PLATE REMOVAL. Simply unscrew the plate and remove. However when unbolting the bolts BEHIND the license plate only remove the two bolts holding the bumper cover to the bumper. There are, I believe three that hold the plate support bracket, DO NOT remove these bolts. The two to remove will be the two lower ones from the rest.
Step #5 REAR BUMPER COVER REMOVAL. Step one, remove the 11 bolts on the top of the cover. (see illustration below)
Next remove the back-up lights, simply unscrew the screws holding it in place and it will slide out. Unplug the bulb and set aside.
Next, there are dirt skirts in each wheel well, remove them. Once that is done there are 2 bolts holding the bumper in place from underneath, going into the bottom of the quarter panel.
these can be reached with a ratchet and one if not two long extensions, from underneath the car.
Next, below the license plate on the underside of the bumper, there are 5 screw-clips. Remove them.
Now the hardest part, there are two nuts holding the bumper to the SIDE of the quarter panel, similar to the nuts used for the tail lights. They must be accessed via the trunk. best is to use a small ratchet and short extension. (see below for location, on the inside of the quarter panel of course)
there are two for each side. This is probably the trickiest part of the bumper removal. Once these nuts are off, the bumper will slide off horizontally.
*CONGRATULATIONS YOU ARE 1/3 DONE WITH THE REMOVAL STAGE*
Go take a break, stretch, and pat yourself on the back
So, lets get started.
Alright we shall run from the back to the front of the car in the removal stage.
Step #1. TAIL LIGHT REMOVAL. To do this you must remove the nuts on the inside of the trunk. The tail lights must be removed FIRST before the center garnish can be removed. There are 2 nuts holding each light in place. (see below for location)

Remove these bolts from the inside of the trunk and the light will slide out. Now rotate and remove each bulb from the light and remove the light.
*note* if you wish to remove the bulb and wiring assembly, you must go inside the trunk and unplug the harness, then it will simply slide out. If converting to 3000gt tail lights there is no need to take the bulb wire assemply out.
For further help on the tail lights, at the end of the first video available at the 3S PowerHour site there is a tutorial on how to do so.
Welcome to 3SiDIY.com!
Step #2 CENTER GARNISH REMOVAL. To remove the center garnish, it is the same as the tail lights, just simply take each nut off from the inside of the trunk. there are 8 nuts to be taken off. (see below for locations)

remove these nuts from the inside of the trunk and the center ganrish shall slide out straight backwards.
Step #3 REAR QUARTER PANEL EXTENSION REMOVAL. These are the small light housings attached to the quarter panel. To remove, first unbolt the support bracket. (see below/ red arrows)

next, unscrew the screws holding it in place to the trunk area (see above/ green arrows). Now it will slide out horizontally.
Step #4 LICENSE PLATE REMOVAL. Simply unscrew the plate and remove. However when unbolting the bolts BEHIND the license plate only remove the two bolts holding the bumper cover to the bumper. There are, I believe three that hold the plate support bracket, DO NOT remove these bolts. The two to remove will be the two lower ones from the rest.
Step #5 REAR BUMPER COVER REMOVAL. Step one, remove the 11 bolts on the top of the cover. (see illustration below)

Next remove the back-up lights, simply unscrew the screws holding it in place and it will slide out. Unplug the bulb and set aside.
Next, there are dirt skirts in each wheel well, remove them. Once that is done there are 2 bolts holding the bumper in place from underneath, going into the bottom of the quarter panel.

these can be reached with a ratchet and one if not two long extensions, from underneath the car.
Next, below the license plate on the underside of the bumper, there are 5 screw-clips. Remove them.
Now the hardest part, there are two nuts holding the bumper to the SIDE of the quarter panel, similar to the nuts used for the tail lights. They must be accessed via the trunk. best is to use a small ratchet and short extension. (see below for location, on the inside of the quarter panel of course)

there are two for each side. This is probably the trickiest part of the bumper removal. Once these nuts are off, the bumper will slide off horizontally.
*CONGRATULATIONS YOU ARE 1/3 DONE WITH THE REMOVAL STAGE*
Go take a break, stretch, and pat yourself on the back