[snake2]

i thought FF7 lets you save before swithing discs (i forget if it does), anyway try this

but in any original, then hold down the lid senser, the disc will spin slowly then speed up, when the disc speeds up (with out touching the lid senser) take the original out of the psx and put the backup in the psx and it should play.

i used this method to play my backups that i wanted to use a gs with them and it will work on any multi disc game.