You will need an AutoCad viewer program to work with these
files. They are in DWF format. They can be saved as DWG's by right clicking
on the image.
WHIP! Viewer
WHIP!® Viewer allows you
to quickly and easily distribute design files over a network without
AutoCAD® software. It boosts collaboration and information exchange
among project members, and it’s available for
download free
of charge.
Warning ! - Competitors
found downloading/using these will be severely humiliated.:)