Maybe we should not have Wad manager conveniently on our SD card when kids are around. How come it's always the most vital files that are deleted too, why not the crappy VC games.
Preloader unfortunately uses IOS60 to operate and seeing as that's probably been removed you'll have trouble recovering with that option.
Without video I doubt if even the savemiifrii trick will work.
Bootmii installed as boot2 might have bene handy.