For installing on Windows 7 (64 bit):
1. From the RGUI, select Packages->Install package(s) from local zip files …
2. Select ASSET_1.0.0.zip
3. Select Packages->Load package->ASSET to load the ASSET package.

For installing on Unix:
1. From the Unix command prompt type 
           R CMD INSTALL ASSET_1.0.0.tar.gz -l <folder>
  where <folder> is the path to the folder you wish to install the ASSET package.
2. Start R and type library(ASSET, lib.loc=<folder>) to load the ASSET package.

Once the ASSET package is loaded, type ?ASSET in the R command line to get started.