THE theory that Darren Hayes scrapped the video for his debut solo single, Insatiable, because his hair was blond was unceremoniously given the boot by the singer. But after checking out the design for his Spin album, there's no doubt he's going for an image overhaul. The artworked image is barely recognisable as Hayes, signalling his more sophisticated approach to his look. Hayes is heading back to Australia in April to launch the album, and has threatened a major talkfest and a showcase gig. "Put it this way: people are definitely going to know I'm around,'' he laughed