[Rd] non-Sweave vignettes in packages

[Roger D. Peng]

Is there any way to include non-Sweave "vignettes" in packages so that 
they can be launched with the vignette() function and will show up 
when doing library(help = packagename)?  I'd like to just include a 
short PDF file with the package which does not come from Sweave 
sources (just simple LaTeX).  Copying the PDF file into the inst/doc 
directory of the sources, appears to be insufficient.  Is this out of 
the scope of the vignette() function?

Thanks,

-roger

-- 
Roger D. Peng
http://www.biostat.jhsph.edu/~rpeng/