The way listed here to swap games works, but it also envolves a lot of work and the process of converting games on a PC. I wanted to share the method that I use as it works nicely for all games and is all done on the Pi. When looking at the steps, it appears to be a long process, but once you do it in real-time it takes about 30 seconds and is quite easy. This is with using a wireless Xbox 360 controller but should work with most control inputs.

I have my Xbox Button set to open the Rgui and my Hotkey Button is the Left Joystick Button, so I have to press down on the joystick and the Xbox BTN at the same time to open it but one can set this up pretty much how ever they want this is just how I have it on mine.

When a game disc swap pops up, open the Rgui and do the following in the menu…

STEP 1: Go down to “Options” and press the “B Button”.
STEP 2: Select “Core Disc Options”
STEP 3: Select “Disc Image Append” (this will take you to a file broswer). Press the “B Button” on this screen to open up the directory list. Go down to your PSX roms directory and press the “B Button”. Go through the game list until you find the .CUE file of the next CD for the game your playing (EX: Metal Gear Solid (USA) (v1.1) (Disc 2).cue). Select the file by pressing the “B Button”. This will take you back to the game screen…
STEP 4: Open the Rgui menu again and go back to “Core Disc Options”.
STEP 5: Select “Disc Cycle Tray Status” (this will eject the virtual disc tray).
STEP 6: Go up to “Disc Index” and move the “Left Joystick” to the right to select the next Disc. (should go from Disc 1 to Disc 2…)
STEP 7: Go back down to “Disc Cycle Tray Status” and hit the “B Button”. (this will close the virtual disc tray).
STEP 8: Press down on the “Left Joystick Button” at the same time as pressing the “Xbox Button” to exit the menu back to the in-game disc swap screen.
STEP 9: Press the “Start Button” on the disc swap screen to have the game check the disc. At this point it should load the new disc and allow you to continue playing the game.

A quick way to practice this method is to load the 2nd Disc of MGS and start a new game… It will bring you to a disc swap screen asking you to put in the first disc and press stop and then you can use the method above.

Whats nice about this is its quick, simple, and the save games should work just fine when swapping discs.