Block 120 is the torque log, so what you want to do is a full throttle run, from lowish revs (somewhere before your turbo comes in) up to as close as the red line as possible, keeping your foot planted all the way. Your best bet would be in 4th gear, so you would get a nice long run through the rev range while accelerating, your rev'ing slower so getting more data logged per second, but your end speed might get you in trouble. You can use 3rd gear, but 2nd is probably too short. You dont need a coast down, but I often dip the clutch for a while so I can identify where the point in the logfile where I 'stopped'. You'll also want as level a bit of road as possible, also as straight as possible cos you'll have the foot planted.
Hope that helps !