I've just fitted an FZ6 pannier rack (Givi PL351) to my 2003 FZS600 over the weekend, it was really simple. The parts I made are being powder coated at the minute but I will post pictures when I get them back towards the end of the week.
Essentially I just made a mount which bolts under the grab handle at the back of the bike for the top of the pannier rack. The point where the rack bolts into the footpeg is unchanged, I just bolted it in above the footpeg rather than below as this conflicted with the exhaust mount. And finally the bar which links the panniers on both sides to each other I cut in the centre and made approximately 20mm longer.
It was really easy, only took me a few hours, and you dont have to resort to having one of those awful wingracks on your bike.