If you are using the symbols more often, it is convenient to copy the whole library to your harddisk (abt. 60MB)

To load the toolbar menu into AutoCAD, start AutoCAD and type <menuload> at the command line.
At the "Menu Group"-tab, browse to the directory where you copied the Hackman library from the CD-ROM.
In the "System"-subdirectory, doubleclick the file "Hackman_symbols.mns" and click <Load>
The toolbar menu is now loaded.

To get it work properly, you also have to add some directories to the AutoCAD search path in the <Options> dialog.
These directories are:
"Library directory":\System
"Library directory":\Symbols\Face
"Library directory":\Symbols\2D