R library

Hello,

I was just wondering how to add an R library. I found on this forum a post with a protocol to build a contour plot with R. This protocol use a R custom script calling a library called akima.

If I start the protocol I'll get an error: library not found.

I found the library here http://cran.r-project.org/web/packages/akima/index.html but then I don't know where I should add it (or where I can find related documentation).

Thanks for your help

florent