I thought the hardest part of Sebastian Loeb's challenge's wasn't getting the time but getting around cleanly! Once I got a clear run in I got gold first time on all 3 pretty easily.
My tip, use a wheel, all aids off (bar abs=1). TCS actually slows you down and stops you from powering through a slide, which hurts your time badly! Also try entering the corners after turning in sharply, counter steering lightly with plenty of throttle control.
Also you'll get to pick up the Co-Drivers cues, so say "3 right long"= long right hander approach in 3rd gear etc. Don't follow the suggest gear, most of the time its way too conserative on rally tracks.
Edit:
Never mind, you've already done it! Well done!