[Rd] running Sweave from Windows XP Explorer

[Gordon K Smyth]

I'd like to create a suitable batch file or shortcut so that I can run Sweave on a .Rnw or .Rtex
file simply by clicking on the file from Windows Explorer in Windows XP (as I do with latex,
bibtex etc).  This looks tantalisingly possible using R CMD BATCH or Rterm possibly in combination
with a .bat file.  Has anyone succeeded is setting it up and would give me a pointer?

Thanks
Gordon