Welcome back c_g.
Not much more to add that hasn't been said already.
I remember following you down Conholt Hill on mountain bikes a while back and thinking you;re mad going down there at the speed you were going, especially on knobbly tyres at 40+ mph.
I seem to remember you were in the tuck position over the back of the saddle with your elbow's in. That technique is not so different on a road bike. You just need to learn to trust your tyres. They offer a lot more grip than you think.
As suggested above, see if you can go out riding with other people and try and match their speed and lines when you can. Failing that, you could always wait until Rusty and I come down and then you could follow me as I am now a riding god!! 
Edit: mountain biking will always be my first love though!
We'll see. They all say that at first. 
That didn't worry me but, then again, on a mountain bike I feel more stable. Yes, you're right, I do need to trust my tyres. I hit 56 kph the other day, had to force myself to relax due to the poor condition of the tarmac. Should really have slowed down before I started the descent. 
