Doodad help

How do you place 1 doodad on top of antother like making a bridge with the arch doodad on top of it? And how do you stack doodads? please help!

You have to remove their pathing in object editor, turnig it to "pathing texture"-->none
When you have done that to the arch you can ctrl+pageup and get it in the right height and place it on the bridge..

Thank You Soooo Much!

Meh. Wazza beat me to it... um, yeah ctrl+pageup/down