Your limit screws are either out or your hanger is bent which is casuing the rubbing. Look DOWN over the gears and your deraillure should be parallelle with the cassette, if it appears to be coming out on an angle the hanger is probalby bent. Take it to a bike shop and it should be an easy fix .
sweet bike mate, as for your hanger take it back to where you got it from and ask them to sort it out. after all its your bike and you want it to be right! btw what tires are they, they look pretty good?