Is discussed of course already long ago. Two things. You have to switch off the automatic resize/center option in the Vue Pro preferences. Then best is to create a sort of cube that defines the maximum dimensions of your scenery that you plan. And this you always use - in Poser or other programs to setup the components. Someone here has even done a sort of ruler to have an extra help for that long ago. Then you export the components from Poser with this cube. Import that to Vue and then delete the cube - all objects have the right size because Vue looks for the maxima. You can use this cube as well to setup the dimensions of your plants and buildings etc correctly - and as help for positioning too - if you have the "ruler" functionallity there.

One day your ship comes in - but you're at the airport.