like i said, im new and have a question.. how do you play on supercross tracks while online ?

i need help ! i just baught the game and i want all the new sx and mx tracks but i go on puremxs.com i try to download bikes and tracks they download fine but when i try to extract them to my mx simulator file it says there are no files to extract and i can clearly see the file. haha. ITS DRIVING ...

i just downloaded the demo and im confused on everything... everything is slow and the ground is orange ? im also confused because im trying to figure out how to put it in 3rd person and im pretty mad because the demo version doesnt have free ride D: