Library

If i need piece of company and i don't have in my library, how i do for put in my library for always, not just in my draw?I want open autocad and he's in my library.

Go to the company website they sometimes have what your looking for.

I believe she already has the file, she wants to know how to permanently add it to the Library.

Why can't you simply save the downloaded dwg file in the same place as the rest of the "library"? How do you access your "Library"?

EDIT: After typing this out, I realized it might not be what the OP asked either.

The only way to have this sort of thing "already in" a new drawing is to put them in a template drawing and use the template for all new drawings.

 

However, I keep that sort of thing in a separate folder and navigate to it with the design center when I need one. You really don't want to fill up your template drawing with a lot of stuff that may not be used in it.

 

Another way is to include the folder these items are kept in as a custom palette.

Maybe this will help. http://knowledge.autodesk.com/support/autocad-mep/learn-explore/caas/sfdcarticles/sfdcarticles/Adding-MV-Part-from-another-source-to-your-library.html

The OP is using MEP 2010 they need to use the content builder to add parts to their catalog.