Can't install Sweave

If you put a copy of Sweave.sty into your latex installation, in a few 
months you'll have an obsolete version, and things will just not work.

A link from ly latex installation to the original file in my R installation would do fine? It works, but is there a downside I wouldn't know?

Background is that I want to use kile for editing my .Rnw file (which will be more text than calculation), with the convenience of having the .Rnw and the .tex file (and the .bib file) all in one window, with an integrated Konsole window at the bottom.

Thanks,
Rainer