Instructions for making "bumper stickers".

  If you plan to tape these to the inside of your car's rear window
just print them on a good quality ink jet printer or color laser
printer, cut them out, and tape them on.  If you can use light card
stock that may work better because it won't wrinkle.  In some cases
you may need to cut a piece of aluminum foil or light cardboard to put
behind the sticker so that light doesn't transmit through and give
the sticker a "washed out" look. 

  If you don't own such a printer you can do this at Kinko's or other 
print shops for a few bucks.  I printed a set of these at Kinko's on a
"Fiery" (sp?) printer on light card stock and they turned out very
well - they look as good as any other bumper stickers.

  If you plan to actually put these on your bumper I suggest you
contact a printing shop that has experience making real bumper
stickers.  Otherwise, you're pretty much on your own as I've not tried 
it myself.  While it's easy enough to print these onto a full page
sticky back label, cut them out,  and stick them to your bumper the
paper will likely disintegrate the first time it gets wet.  The fellow
at Kinko's suggested that it might work ok to take a regular color
page, cut out the stickers, laminate them, and then glue them to the
bumper.