Probs resizing/scaling walls+roof

[Anonymous]

I have a simple massing model consisting of walls and a roof that I need to scale down a bit, when I try to do this using the rescale function the roof stays perhaps at the same height or up some distance about the walls.

Anyone know if there is a way to resize/scale the entire object together without this happening?

[Anonymous]

Select that elements, go to the 3D window (view from top) and save as OBJECT (non GDL!). Insert that object and then you can modify its dimensions.

[Anonymous]

is there any way to resize the model and edit individual parts afterwards? I've imported a dwg in a wrong scale but I did only notice it when I was trying to place trees and the model is rather complex already. Anyways, I'll need to edit the model later on. Can I explode the model and edit the individual parts after scaling? I've tried but didn't work, so maybe there is a trick?
Thanks!
Suse