make a disk image of the PS1 game on your PC. doesn't really matter which program you use, the emulator isn't picky. don't even need the smaller files like cue files, just the bin, iso, img, nrg or whatever will do.
then FTP the image to your xbox hard drive, or burn it onto a dvd-r, and load up the emulator, browse to the images location and select it to play it.
simple as that
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