Just spent 15 minutes trying this one, and managed Gold without too much trouble.
I use Auto transmission, and DS2 like yourself, so it is more than possible.
Driving aids I think are off as the dashboard light does not flicker when traction is lost.
I don't have the means to get your gamesave from email onto my PS2, so I can't do the test for you.
Video of my best lap (19.7MB)
Tips:
1) Move slightly left before the 1st turn to help straighten it out.
2) Ignore the rumble strips on the first turn, consider the grass as the apex, and the sand as the runoff.
3) Roundabout sign on right (0:15 on video). You should reach this sign within 12 seconds, and be travelling over 200mph. If not, don't worry too much as more time can be lost in the corners than on the main straight.
4) Keep in the centre 2 lanes as you can lose around 5mph on the dusty edges of the track. (0:37)
5) Brake hard halfway between 100m board and the end of the line in the centre of the road. (1:02)
6) Aim for 2/3rds throttle as you exit the corner in 2nd gear (1:07). Floor it as soon as you change to 3rd.
7) Brake until the car auto downshifts 1 gear for the kink (1:30), then get back on the gas for a moment.
8) Start braking again before the start of the paved area on the right (1:31).
9) Start braking for the last corner before the gear selector appears (1:39).
10) Keep off the curbs and the grass, and remember 2/3rds throttle as you accelerate for the line (1:42). I lost at least half a second here on this run.
The times in brackets are positions in the video which begins 3 seconds before the clock starts. Subtract 3 seconds from each for target times if you are going for gold.