Well, I was able to do it nicely with a sub-request after calling 'lookup_filename'. I will still be picking up a copy of the cookbook though : )
> > I am trying to map a uri to a file based on certain factors. I > would like > > to have this done after the 'Trans' phase when certain information is > > available. I noticed when the original file mapping does not > exist (what > > apache maps in it's 'Trans' phase) the 'content_type' method > does not return > > a value. > > > it shouldn't. mod_mime needs the filename the URI maps to in > order to determine > the MIME type.