I have not checked for registry entries but it does write to ini files contained in its own directory. This program was written for Win 3.1 but still runs under XP pro & Vista home basic. The program is simple but also powerfull and allows drawing commands through keyboard input as well as using a mouse. It can import/export in dxf which Autocad will also do. I have been using a 2D program called Draft Choice for windows. Autocad 2007 Portable, free autocad 2007 portable software downloads.
