I have a 2000 cavalier and love the look of projector headlights, I know they make them for a 95-99, so my queston is, would it be possible to take the projector set up from the old style and customize them to make them fit in the 2000+ housing?
 
yes, it's been done.  you can get a set of projectors and mount them in your headlight.  it does take a lot of work though.
 
 
try it, id like to see.  i havent seen anyone do it.