re: array tool
There isn't a button for an array tool (as you may or may not know). Array is part of the copy function, so when you want to make an array, you start by copying (select object, then select move tool, and then hit Ctrl).
Array can be done two ways after you place your copied object. When you have placed your object and want to array the object in the area between your copy and the original, you type /x with "x" being the number of copies you want to see between the two (say if you want to make an array of 5 objects between the copy and the original, you type /5).
On the other hand, if you want to array beyond the area beyond the copy and the original, type *x with "x" being the number of copies beyond the first copy (like *5)
re: Mississauga City Hall
Your model is still on the 3D Warehouse, Martinsizon. The link for it is
here. It's very easy to find... just search for "mississauga" in 3D Warehouse.