Not good...just to make you feel better here:
I was giveing my girlfriend at the time (now my wife) about 18 yrs ago, a lesson on changing the battery, carefully explaining the difference between pos/neg. You know the colour diff, and the +/- symbols......well i had just bought a Crappy Tire battery, not an exact replacement...well it would only fit in the battery holder one way ( the opposite to the orig.)...so i put it in and continued explaining the dangers of getting the cables wrong to my wife when i hooked up the second cable, amid a small shower of sparks too, yet i continued to tighten the cable down.
Needless to say smoke and such insued.....ALL fus. links fried, fuses fried, and worst of all the ECM!!! A big mess indeed.
I FEEL your pain...i was only 17 yrs old sooooo i blame it on my pretty wife distracting me...LOL
Tye
I know that doesnt help your situation...but dont feel too bad..youre not the only one!!!