Parasite Eve 2 came on two discs, but there was an old patch by a guy known as "shalma" that combines both discs into one, for use on emulators. It was originally posted on ngemu forums back in 2009 along with disc combining patches for many other games. Unfortunately, it doesn't seem like anyone backed up the Parasite Eve 2 patch before ngemu's files got deleted.

There is an archive.org link of the forum thread, but no archived link for the attached file itself (eve2_multi_preview.7z)

If anyone can find this patch somewhere, you'd be a hero.

>Archived link:
https://web.archive.org/web/20091008023513/http://forums.ngemu.com/misc-psx-discussion/118402-disc-combining-kits-4.html
>Current link (no file)
https://www.ngemu.com/posts/1702350/