There are three zip files availible for downlload:

You can download the files using CMP Books FTP site at: ftp://ftp.cmpbooks.com/pub

The files all have their read-only attribute set. You can not edit or modifiy the files in AutoCAD unless you clear the read-only file attribute.

To clear the read-only attribute of a file, highlight the name of the file in Windows Explorer. Then, press the right-hand button of your pointing device to bring up a shortcut menu. Select Properties from that menu to bring up the Properties dialog box. The attributes of the file are shown near the bottom of the General tab in this dialog box. Click the read-only attribute check box to clear it.

Also, you can use this same technique to clear file read-only attributes within AutoCAD's Select File dialog box, and you can clear the read-only attribute of multiple files by using any of the Windows file-selection methods to highlight them.

The layers in most of the AutoCAD files for the exercises use black as the object color. For many files, you will want to change the layer colors so they are appropriate to your computer's screen color.