While many users search for "portable" versions of older software like AutoCAD 2006 , it is important to note that Autodesk has never released an official portable version of this software.
Introduction
Using Your Portable AutoCAD 2006
Step-by-Step Instructions
Autocad 2006 Portable offers many of the same features as the full version of Autocad 2006, including: autocad 2006 portable