R-stats and the R/GRASS 5 interface are separate packages:
I) First install R itself, check out the R FAQ for details.
II) Installation of extentions:
Extensions can be installed in two ways depending on whether you have direct internet access or whether you are working offline or have already obtained the package archive.
II a) If you want to install directly from the Internet:
#start R or R-GUI: R # you need to be connected to Internet to use these commands: install.packages("akima") install.packages("VR") install.packages("GRASS")
II b) Alternatively, if you have already downloaded the package archives, do this in a terminal:
R CMD INSTALL akima_0.3-4.tar.gz R CMD INSTALL GRASS_0.2-12.tar.gz #etc