This is a fairly easy process based on THIS thread... the most trouble I had was trying to figure out where to put the switch. There is no room to work with... I ended up taking out my card reader on my PS3 because i never use it and just mounted the switch there. You could possibly let it hang out.
It's up to you. Just remember that if you plan to retain original functionality as far as the drive sensor and automatic load/unload motor, you will need 2 additional small on/off switches.
The Switch I purchased:
1. Solder a wire from pin 6 to pin 1.
2. Solder a wire from pin 3 to pin 4.
3. Solder a RED wire to pin 4, and a BLACK wire to pin 1. This will be your power wires that run to your Blu-ray load/unload motor. I'd say make the length about a foot just to be safe. You can cut off what you don't need later.
4. Pin 2 and pin 5 are the power source. Doesn't matter which way you connect those. I'm using a plug-in power adapter with an output switch on it up to 12 volts. It's set at 3 volts.
That's the hard part if you can believe it. Now you gotta bust open the PS3. Very easy to do and no cutting or breaking involved.
1. Take the one bolt out on the side and slide the top off.
2. take the rest of the screws out and take the second top off. This will expose the Blu-ray drive.
3. The Blu-ray drive has 2 plug-ins that need to be unplugged. After that it comes out freely.
A. A ribbon on the bottom
B. A small plug-in on the left side
Note: Your main goal is to get to some small screws on the bottom so that you can remove the metal cover. You may choose not to unplug anything. That's up to you.
4. Take the metal top off. you will see a small circuit board with 2 wires towards the front of the drive. This is a sensor that allows the game to be sucked in. You need to disable this by either cutting the small wires, Hooking up another small switch so you still retain original functionality, or put a small piece of tape over the sensor.
5. Unscrew the plastic top and take that off. This will allow you to see much more of the drive on the inside.
6. The plastic piece I'm pointing to in the picture above needs to come off. That will allow us to see the load/unload motor. One small screw will allow you to remove this plastic part.
7. Once removed you will see the small motor which is what we're after and makes this possible. You'll see 2 small wires soldered onto the motor. RED and BLACK. You have another tough choice now, if you chose to add a switch to the load sensor above, you will need to add a switch to one of the original motor wires also. This way, when you put your game in and the sensor sucks it in, the motor will work automatically like it did to start with.
If you have the sensor turned on with a switch, you need the motor turned on auto with a switch. That's where the 2 additional switches come in if you choose to retain original functionality. If you plan to load and unload games manually you only need 1 3-way switch and can disregard anything I've said about extra switches.
The foot long wire you solder earlier to pins 4 and 1 now need to be soldered to the RED and BLACK terminals of your motor. I just touched my soldering iron to the terminals and removed the factory wires, tucked them away and soldered the ones from my switch to it.
9. And that's pretty much it. Where you plan to mount the switch or switches is up to you. The way I have mine set up is when the switch is up the motor is sucking in. I start to put a game in and it sucks it in. When the game is in and the drive engaged I turn the switch to the middle position or off. Turn on the PS3 and the original game or Swap Magic will register with the XMB.
No need to actually boot the original game or swap magic because as long as the game is recognized by the system, it has passed any media checks. Next, I flip my switch down and the drive disengages and spits my game out. I then flip the switch back up and insert my backup and turn the switch off. The whole time you do the swap, the PS3 will still say you have a game inserted. So if you choose to try this, you don't need anything special. 1-3 switches and an original PS2 game. Enjoy!