[R] contributed packages and downloads questions

[Hanna Craig]

Hello,

I am trying to download two library files: multiv and e1071 to do principal
components analysis. I was able to unzip the folders to my R directory, but
when I type library(multiv) in the console I get an error message: Error in
testRversion(descfields) : This package has not been installed properly
 See the Note in ?library
So, it seems that I am not downloading these two library files properly.
Where can I find the library files (I cannot find my way back to them for
some reason) and how do I download them? Thanks!

Hanna