To install the tcshrc package for your current account, choose from the following scenarios.
make install at your command prompt.
The above command essentially keeps a backup of the existing .tcshrc, if there is one, as .tcshrc.ORIGINAL. If such a backup file already exists, no backup is kept in order not to remove the initial .tcshrc file while doing repetitive installations.
To make a backup of your existing .tcshrc file
% cp .tcshrc .tcshrc.ORIGINAL