First you will go into a private match on trick attack. Go to whichever map you want to unlock the board associated with it. End run right at the beginning and wait for the stats to go away. Once they are gone and you are in free skate go to "Launch" in the pause menu. Activate the mods there but do not launch it just exit out of the menu. Now you should have all mods enabled. Now say you're doing the warehouse board so you need 22 million. Hit a special lip trick and hold it until 220,000 when the score is near the the amount needed switch in between lip tricks while holding it. Keep doing it until you've reached a 100 multiplier. DO NOT GET OFF YET!!! Before getting off go back to "Launch" and disable mods. ***Hold joystick in the direction going down the ramp while disabling mods*** You should have it after that. Here are the scores for each map.


Warehouse Score: Achieve a score above 22,052,000 on Warehouse.
School Score: Achieve a score above 17,715,000 on School.
Mall Score: Achieve a score above 7,001,000 on Mall.
Skate Park Score: Achieve a score above 15,078,000 on Skate Park.
Downtown Score: Achieve a score above 8.966,000 on Downtown.
Downhill Jam Score: Achieve a score above 5.486,000 on Downhill Jam.
Burnside Score: Achieve a score above 22,618,000 on Burnside.
Streets Score: Achieve a score above 17,787,000 on Streets.
Roswell Score: Achieve a score above 9,273,000 on Roswell.
The Hangar Score: Achieve a score above 19,827,000 on The Hangar.
School II Score: Achieve a score above 8,840,000 on School II.
Marseille Score: Achieve a score above 12,155,000 on Marseille.
NY City Score: Achieve a score above 11,651,000 on NY City.
Venice Beach Score: Achieve a score above 11,684,000 on Venice Beach.
Skatestreet Score: Achieve a score above 13,762,000 on Skatestreet.
Philadelphia Score: Achieve a score above 19,355,000 on Philadelphia.
The Bullring Score: Achieve a score above 7,575,000 on The Bullring.
Chopper Drop Score: Achieve a score above 902,000 on Chopper Drop.
Skate Heaven Score: Achieve a score above 11,334,000 on Skate Heaven.