Well,then you will have to download somekinda mod :P
If you saw a video of the Batmobile on you-tube, then they where only showing you a mod that is meant to work for the PC/any other computer (maybe mac.) But there might be a cheat for the Batmobile on GTA SA ps2, but you could look it up on the Internet.
You can't. Only for computer because you have to download it.
San Andreas
I DiD =)
You cannot, GTA SA has a much lower graphic system then GTA IV, plus the cars in GTA IV have more addons than GTA SA.
No,you can only do so in gta IV or gta SA
Here.
there are in GTA SA
no
no you can not
No.
If you mean how big the world is then its probably GTA San Andreas.