iges2step is a freeware CAD file viewer for Windows XP/2000/NT. It allows viewing IGES and STEP files and translating between them. The versions of the formats are:
After downloading all 4 installation files place them in the same directory. Run the file "iges2step.part1.exe". This will unarchive the file "setup.exe". Launch it and then follow the instructions.
You may find some simple IGES and STEP file in the "C:Program Files/iges2step/Simples" directory after the installation.