The \Program Files\AutoCAD2005\ folder contains many other folders. Here are brief descriptions of each subfolder's contents:
Backup Contains backup versions for many of AutoCAD's system files.
Data Links This is the pre-AutoCAD-2004 location for the Data Link files for AutoCAD's dbConnect feature. It is preserved for compatibility with pre-AutoCAD-2004 systems. Data Link files are now stored in the C:\Documents and Settings\ User Name \Application Data\Autodesk\ AutoCAD 2005\R16.1\enu\Data Link folder.
Drv Contains special software drivers that AutoCAD uses for plotting and display features.
En-US Contains resource files for the U.S. English version of AutoCAD. Versions of AutoCAD for other countries will have different folder names .
Express Contains support files for the Express tools. You will see this folder only after you've installed the Express tools.
Fonts Contains AutoCAD fonts.
Help Contains AutoCAD help documents.
Plot Styles This is the pre-AutoCAD-2004 location for the plot styles. It is preserved for compatibility with pre-AutoCAD-2004 configurations. Plot styles are now stored in the C:\ Documents and Settings\ User Name \Application Data\Autodesk\AutoCAD 2005\R16.1\enu\Plot Styles folder.
Plotters This is the pre-AutoCAD-2004 location for the plotter configuration files. It is preserved for compatibility with pre-AutoCAD-2004 configurations. Plot styles are now stored in the C:\Documents and Settings\ User Name \Application Data\Autodesk\AutoCAD 2005\R16.1\ enu\Plotters folder.
Sample Contains sample drawing files, as well as sample ActiveX, DesignCenter, VBA, and VisualLISP files.
Support Contains the files that define a variety of AutoCAD's customizable functions.
Template This is the pre-AutoCAD-2004 location for AutoCAD template files. It is preserved for compatibility with pre-AutoCAD-2004 configurations. Template files are now stored in the C:\Documents and Settings\ User Name \Application Data\Autodesk\AutoCAD 2005\R16.1\enu\Template . This is also the location for sheet set template files.
Textures This is the pre-AutoCAD-2004 location for texture files for AutoCAD's rendering feature. It is preserved for compatibility with pre-AutoCAD-2004 configurations. Texture files are now stored in the C:\Documents and Settings\ User Name \Application Data\Autodesk\AutoCAD 2005\R16.1\enu\Textures folder.
Tutorial Contains Autodesk's own sample tutorial files.
UserDataCache Contains source files for custom user data.
WebDepot Contains HTML files for AutoCAD's online registration.
WebServices Contains files for AutoCAD's web services such as the Communication Center.
For customizing, you should work with the files in the C:\Documents and Settings\ User Name \ Application Data\Autodesk\AutoCAD 2005\R16.1\enu folder. This is where you'll find the data links, plot styles, plotters, and support folders that work with your login username. By placing custom configuration settings in this folder, each user can have their own AutoCAD custom configuration on the same computer.