You cannot. Fortuna doesn't run PSX games. It is exploit on which You can run homebrew applications like i.e emulators (POPS via POPStarter or PS2PSXe). Disc images only; for POPS they must contain TOC, for PS2PSXe they cannot contain TOC).
From discs, none of the exploit allows You to run games from different region than console and/or from CD-R or CD-RW. That's feature only modchips can provide (or cheat engines pressed on disc for swapping). The same also for PS2 games on CD (in theory it is possible via CDX or UMCDR implementation, just like fake DVD-Video via ESR but no one written such app and high probably no one ever will write it).