I don't know.
But what you can do is search for a walkthrough on the game, and I am sure you will fine the answer on one of the walkthrough.
A2:
To complete downtown you must finish all of Master Zen's missions and if you cant find Master Zen then do more mission to get peices for the ranch. -Answer by:mike23596
To complete a spine transfer you must go up a quarter or half pipe that has another quarter or half pipe on the other side of it. Once you have got that go up the ramp and press r2. Hope that helped! -Answer by:mike23596
Q:Where can you find tony alva? i impressed his bouncers and looked all over santa monica!?
A1:
Tony Alva is at the top of the long ramp like road with the sign that says Santa Monica on it. You go right under it on your way in. If that doesn't work, try your map and compass. If THAT doesn't work, you need to finish any other missions withstanding in Santa Monica.
A2:
When you enter santa monical go straght till you reach a long hill he should be there
Q:In Beverly Hills the How do you pull the roof down for boone?
A1:
You need to wrap your thumb or finger into your shirt, then rub X or A as hard as you can. Not looking at the screen helps. If your get a error message, try again. It will work. :)
A2:
If you take deoterent hold it upsidedown and rub it really fast on the x button that should do it make shure you leave the top on
Q:How do you unlock Atlanta? Also so is there any other secret levels? Thanks!
A1:
In classic mode, there are tons of things you can unlock by doing it on easy and sick. You get at least two secret skaters and 6 new levels. I am not sure on how many levels you unlock but you do get marsellies, the ruins, Atlanta, the mall, Chicago and many more.