"Normally the diagonal version of a door, window, curtain, etc. is not categorized to show up in the catalog. The version you select in the catalog is always the non-diagonal version and the game simply switches it to be the diagonal version if you place the object on a diagonal wall. If a custom object is made to work like the Eaxis ones are, the diagonal versions of the objects should not need to have their own catalog entry. Usually the OBJD section of the object has no catalog bits set because of this. "
This is the reply I recieved from SimWardrobe, for anyone else who might have wondered about the answer to my question..thanky to all the wonderful sim community.  you guys help make the game fun!

Yes I have kept all of the custom content in my downloads folder, just more organized, and I have been replacing all my hacks with  the newer and shiner ones..I also use HDCU..
I am not sure what you mean about the move objects cheat. I do use it in the game and sometimes forget to turn it back to the "off" position..oops

I have been in the process of organizing my downloads folder using Delphys Download Organizer, and Paladins Sims 2 Catagorizer.  While doing this I discovered that my diagonal build/buy objects (curtians, windows and doors) were disabled. Does anyone know why they disabled and if it is safe to enable them ?   
I had done a clean new install for AL.  removed all my downloaded lots, but kept all custom content and hacks to put back into my game in a more organized fashion.  I have all the expansion paks and a few of the earlier stuff paks. 
 I stand in awe..