Don't worry about the necro; it's stickied for a reason. ^_^

I believe you're referring to The Misdventures of Hiro by The Decapitated Mole. That fic was posted several times as he wrote and rewrote it... here's the final version.

The Misadventures of Hiro

If you'd like an older version of it, I'll see what I can do. Feel free to ask, as we're happy to help.