Thank you Mike,
That is indeed what I used in the code eventually.
http://www.r-statistics.com/2010/04/changing-your-r-upgrading-strategy-and-the-r-code-to-do-it-on-windows/

Thanks for answering,
Tal

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On Mon, Apr 26, 2010 at 9:31 PM, Mike Prager <mhprager.pdy@gmail.com> wrote:

> On Fri, 23 Apr 2010 15:22:45 +0300, Tal Galili <tal.galili@gmail.com>
> wrote:
>
> >Due to the new R 2.11 release, I want to implement Dirk's suggestion
> >here<
> http://stackoverflow.com/questions/1401904/painless-way-to-install-a-new-version-of-r
> >
> >.
> >
> >So for that I am asking - How can I (permanently) change R's library path?
> >(The best solution would be one that can be run from within R)
>
> To me, it seemed more straightforward to do this outside R.
>
> Just set the environment variable R_LIBS in Windows to something like
>
> R_LIBS=c:/R/Library
>
> Then, delete your R installation. Install the new version and all
> desired packages.  The add-on packages will be located according to
> your environment setting, and future updates will not require add-on
> packages to be copied or reloaded.
>
> HTH
>
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>

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