To start a new topic just go to some section and click on New Thread :)
If ya wanna topic with hacking subject I suggest to start a thread in ROM Hacking - Team Discussion (if ya wanna help from the other ones and find some new parts to your hacking team) or in Scrapbox (if ya have already idea 'bout the hack and ya think ya can describe a little) :)
And by the way try to avoid using Caps Lock. It's rude :)