How and where did you change your truck into a smaller vehicle?

The second one is behind a dumpster in same area when you emerge out of the tunnel before you climb the big pipe. sorry for my bad english

when you first enter the area through the pipes and stuff. you are in a big industrial
area look around here for it. it should be in the 11:30 direction as you enter the first
area behind a buliding by a pipe

I can't change my truck with a smaller vehicle and thus can't go throgh the p***age near
the train. Where can I find a smaller one. Help plase !!!

when you are comming towards the track crossing , take right just before the track
crossing into open jungle fields. you will find a small truck there

I Found first artifact but i cant find the 2nd artifact please HELP ME!

when they say u that u cant go there becouse u have big truck you just turn to the
trainway and just folow it...on your right hand theres a mountian when u pass the mountian
just go forward and youl see a litle car!!!

Hey look here
Night in game and low quality but you can learn artifact points.
And yes small truck:
When they say your truck is big, turn back and pass the railway and turn left from first
empty line. You see a "Scout GT" But it's Controls is hard and camera is wery near.

Oh sorry I forgot the Video link. :(
http://www.youtube.com/watch?v=201cL46nGfk