0. 1st Hairpin: You must know where to start braking. The distance markers cannot be used. Use the speedometer. When it hits certain speed, brake hard and steady (I think it was about 166.5 mph or so)
1. Slalom: you have to be about 100 mph through the whole slalom section. If you fall below 95 mph at any time, you have a lot of making up to do. Just start over.
2. 90 turns: you must brake early and slide the rear end around. Target about 40~50 mph through this section. The last 90 deg. exit is the MOST important! Must have good exit speed.
3. Increasing 270 deg. carrousels: you need to find the speed where you can turn consistently w/o under/oversteer. Maintaining top turning speed is the key. The last right turn exit should be taken at full or near full throttle, all the way out to the straight.
4. Hill & turns: maintain between 90~105 through this tricky set of turns. The car will lose grip as it comes down the hill (this is where you usually turn) so you need to turn and set-up the car at the TOP of the hill.
5. Chicane: it will take few trial & error to find the braking point. It is better to slow down and take this turn properly instead of braking too late and having to pick-up speed for the following straight. If you time it right, you can cut both chicane curbs and carry a lot of speed through it. Keep in mind that this is the last difficult turn and if you mess this one up, you have wasted good 4+ minutes of the run.
6. Last turn: need I say more? You can afford to brake a little late for this one and need to apply gas as soon as you can. This is similar to the last turn on Monza.
Good luck. I am at 4:47.794. So even with few mistakes here and there, you can still beat gold time of 4:52. This was the toughest trial for me because it is so long and technical. But my first 'succesful' run was also slow at about 5 minute mark. I spent about 10 hours on this track alone so don't give up until you have given it good 4 hours or so.