Certain Cheats disable certain achevments.
yes, gta4.net has all the cheats, not many cheats are in the game though.
No cheats.
no aeroplane cheats :'/
no, you can't
Yes.
yes you can but sadly with cheats
you have to dial phnoe #s
can do that, have to start a new game. sorry bud.
no
as soon as you get to drive roman yes you can
gta4.net has them
how do u save your cheats and co des