You're thinking of the FRED command line to stop it from complaining if the player ship is a capship,
Try "-noparseerrors", that will restore lax table parsing. Still, like Goober says it's best to actually fix the problem; fs2_open has some minor order-correction stuff in the parsing code but I wouldn't trust it.
The problem you're having is that there's actually a ":" after "$Stealth" in the code. It should really be a ship flag, and not an extra tag, but for now, if you add the : onto the end of your stealth it should work. If not, post the three entries ($Stealth, entry before, entry after) with the data and that should help it get debugged. If you have any outrageous comments that totally spoil your campaign's ending you can go ahead and remove them.
