When you call a Function from the Library File and if that function opens a Form or Report, it will look for the Form/Report in the Library database itself first and opens it from there if found.
If the Form/Report not found within the library file then it will look for it in the Current database where the library file is attached.
You can attach an .mda file to the current database and call the functions in that file as if they are in the current database.
Open VBA Window of the current database (ALT+F11).