Hello there,
I started using the addon Sony - PlayStation (PCSX ReARMed), and it's working perfectly 
Then, I started playing Metal Gear Solid but when the 'insert disc 2' screen appeared : I did not see how to use disc 2.
Since the workflow is oriented towards opening the game ROM/file and then selecting the emulator we want to run it with : I don't know how to do it without leaving the emulator.
I tried making a quick-save at the end of disc 1, exiting, starting disc 2 and loading the quick-save : it did not work.
How should we do it ? Thank you !