More info? Go here for more detailed information on DXFIO and a free Key Generator program:

http://home.earthlink.net/~strimple/home3a.html

DXFIO is a stand-alone program for creating script files for use with all AutoCAD releases for converting DWG files to DXF and DXF to DWG file format. It provides long filenames support. DXFIO is designed for use with Windows 95 and later versions of Windows. An explorer-type common dialog is provided to locate file folders. The paths to selected folders are pasted into the appropriate fields of a dialog box for use by the program. DXFIO renames any file names with spaces in them, replacing spaces with underbars. This is necessary because AutoCAD will not accept file names with spaces in them. If you have a large number of DWG or DXF conversions to make, this program will save you considerable time and effort.