export to image file

Hi,
I work for while with AutoCAD and some times I simply cant get the quick
effect I want to have.
Some of my clients wants to see my work during processing time, simply they
want to check me every week how does it go. Probably you now what I'm
talking about. Problem grow up when they ask me to send them data via
e-mail - the only problem they accept only *.doc, *.pdf or image files jpg,
bmp, wmf etc. (of course I don't expect from them any other computer skills
except simply "click" and "click").
My question is how to export i.e. large project sheet to bmp or wmf without
loosing quality (in that case resolution)?