On the map you will see a dotted lined square go to the top of the square at high speed and on your right you will see a ramp jump the ramp and try to head to your left (towards the building)
Then you will be on top of the building.
It will look wierd like a Glitch. it is hard to do but it is possible.
More tricks, tips and cheats for this game are right here - Midtown Madness cheats
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