I'd just like to say that my friend from Australia bought the game (he already had it downloaded via origin) and he's at 46% complete already; he says there is no sign of a Hummer or Jeep.
-There is a horn too by the way (the B button on xbox controller)
-The map is close to the same width/length as HP 2010's was; there is just more roads
Oh, and he says that the PC version is poorly optimized and runs horrible on his computer, which is actually a decent gaming rig. (8 gb ram, gforce gtx 470)
If you have any questions feel free to ask me, i'll ask him...just note there may be some delay.