For local play with 2 controllers:
From the main menu select 'Playtime' and then 'Play on this Xbox 360'. You will now need to press
to change the amount of players you have logged in for your 2 controllers, sign them both in and press
which will annoyingly kick you to the prompt for you to select your storage devices again.
Now select 'Cone Capture' at the bottom and pick any track, unfortunately 6minutes is the lowest time limit you can select. Press
at the player screen to begin the race and once it begins capture the green/yellow cones on the track with the player going for the achievement and leave the other controller alone doing nothing. You don't have to collect lots, really one will do but its nice to do something whilst you wait. Once the 6 minutes is up the achievement will pop at the post race screen.Interestingly both accounts got the achievement even though there wasn't another team