I have a game where my PC's have stolen a car and well next game there is gona be a big firefight sins the guy they stole it from is a crime lord and in the trunk is somthing that belongs to him.

Any one got an ieader of how to use vehicle's in DH?

fx. Shoting as a pilot in a valkyr agenst another pilot in some kind of xeno ship. And a tank shoting agenst another thank and so on.

While I'm not a big fan of THESE rules, they may help you out and might even be just what you're looking for.

If you do not want the rules pointed at by Graver, "keep it simple but interesting". Just plan ahead for roles and how you want to "rule-o-thumb" the situation.

For example, your "xeno-valkry-dogfight" could turn out like as the following

At the beginning of each turn, both dogfighters make test for "Piloting"
In a tie, both are shooting at each other, using "Pilot" as dodge
If one of them scores more successes then the other, only this one is able to fire ("being on ones tale")

If the vehicle have more then just "front mounted weapons", you can fill each gap with a rule rather quickly.
Just make a "base assumption" and "spin on". And make sure the people have fun!

Thanks, both of you. I will try and see what i can come up with

make it like ordinary combat. with only a few changes due to alwys being moving. armor should be off the scale as far as tanks go

You can also find the original here:

www.darkreign40k.com/downloads/gaming-aids/dark-heresy-apocrypha-vehicles/details.html