Ever had to convert a set of drawing files to the AutoCAD 2000 file format for someone and needed a quick way to do it?

Open one of the files that needs to be saved in an AutoCAD 2000 file format.  Start the eTransmit utility from the File menu pull-down.  In the Create transmittal dialogue box pick the Add File button and select all the files to be converted.  Now, pick the Transmittal Setups button and in the dialogue box pick the modify button.  Change the Transmittal package type to Folder, the File Format to AutoCAD 2000/LT Drawing Format, and Browse to the destination folder.  Pick the OK button to exit the Modify Transmittal Setup, pick the Close button to close the Transmittal Setups, and finally the OK button to convert all your files to the 2000 format.

You can also reverse the scenario by converting a large set of AutoCAD 2000 file format files into the AutoCAD 2004 file format.  This will reduce the file size to about half their original size.