I was going to try my hand at this but everytime I entered park editor my xbox would freeze after about 10 seconds. I tried re-downloading it and got the same result.
I also noticed that the last park I uploaded never showed up on skate nation. It says I've posted 4 parks, yet it only shows 3. When I tried to re-upload the park it says its already been uploaded. Im having all sorts of fun dealing with ea nation.