AutoCAD Plant 3D

[#1]

I created my own pipes, fittings, valves catalogs, a big portion  is block based parts. But in the beginning I didn't  create the same name folders with the catalogs. Without these folders, catalogs and specs works well. I finished a watertreatment project with them already.

But when I copy these catalogs(pcat) and specs to another computer and place models into the model, I get error message "Can't find symbol for specified part."

My problems are:

1. Without 200 and dwg folders, where are "longhexnumber" blocks and thumbnail pictures stored?

2. How can I copy catalogs to other computers ?

3. How can I get into the right way? After so many custom block based parts created without 200 and dwg folder, I tried create a same name folder with the catalog. But  when I make new block based parts, it cannot work. If I place new parts to model, I get "Can't find symbol for specified part." The newly created part on the tool pallete was a blank box.  

Recreate all block based parts are nightmare. Why no prompt when i was in a wrong way? 

Anyone can help me?  Thanks.

I use P3D 2012. 

[#2]

Have a look through the sub-folders of the Content folder from your C:\, and compare it to the second computer.

You can move that content to a network drive also, check under the Menu's, there is a menu to change the path.

[#3]

I copied the whole folder "C:\Autocad Plant 3D content" to another computer. The folder in destination computer is also "C:\Autocad Plant 3D content". I checked two computers in Spec Editor menu, the shared content folder were both "C:\AutoCAD Plant 3D 2012 Content".

Below is my folder structure:

Catalogs are in "\CPak GB":

My  drawing with blocks are in "\Models".

I searched for the longhexnumer drawings throughout the C:\Autocad Plant 3D contens folder. Nothing was found.

Where is they?  Why it works well in modeling pipe without longhexnumber drawings and 200 and dwg folder?