Autocad 2000 Free Download
Autocad Converter is a batch DWG and DXF bi-directional converter that allows you to convert DWG to DXF, DXF to DWG without the need of AutoCAD.
Googling around indicates that some people were successful in installing AutoCAD 2000 on Vista by using the Compatibility Mode (use Vista's Help & Support for instructions). However, that was for the 32-bit version of Vista and it appears that AutoCAD 2000 won't run on Vista 64. You can try it and see but you shouldn't be surprised that a 9-year-old program as complicated as AutoCAD won't run on a modern 64-bit operating system. If you want to look at some of the threads I found, Google using the search term 'AutoCAD 2000 on Vista 64'.
Autocad 2000 Free Download For Windows 8
MS-MVP - Elephant Boy Computers - Don't Panic! Elephant Boy Computers - Don't Panic!