Same way as like 2/3rds of the forum; looking to download Shiny Gold :D Well actually it wasn't Shiny Gold, but another hack which name I can't remember, but the fact is, I signed up to download a hack :p I honestly can't remember the exact details of how I ended up here, since I'm pretty sure the hack was available for download somewhere else, but PC is pretty much the hub for everything ROM hacking, so I probably would've discovered at one point or another.
Anyways, I signed up so that I could download the game, and then left again, and didn't return until a few months later where I'd gotten into actually hacking the games myself. Took a while before I got out to explore the rest of the forum, but I'm happy I did!