You can do the wheels but you're asking for help? lol Read the tut; Hoppah explains it. They're not that hard. To make a really simple wheel, just use the cylinder primitive. Otherwise make a cylinder, delete the front polys, then make and select the polys around the edge and copy, then scale it down and move it out. Then connect them with other polys, fill in the front of the part you copied with polys, then delete all excess polys (i.e. the ones you made around the edge)