You probably find yourselves wondering: Why anyone would like to have an older version of any program on his computer? Well, as known, Blender is a 3D graphics program, useful in particular for architects and engineers. The latest version 2.6.x has an updated interface and various new features. However, some useful scripts like dxf importer, blender mechanical gears, cad tools etc, are partially implemented or unavailable for the new Blender. So it sounds practical having an older version of Blender installed on your system and being able to use the above scripts! Let's see how this could be accomplished with the following tutorial.