I would use Alcohol 120% (google it) because it has PS1 settings already in it when you burn images (you just hit some drop down box and there's PlayStation as an option).

BTW: It was the Dreamcast that allowed swap disks and even boot disks. Because they figured no body would use GD-roms (or whatever ubiquitous format they used) but it still had the ability to read CD-roms so they I suppose got it to emulate it's own games using CD-roms. Or something.