How to install downloaded zip/tar.gz plugin ?

Hello !

Some time ago , I asked how to make
pagination(, i have
downloaded this plugin, and I do not want to download this plugin every
time when I want to create new nooby test project.

My question is just - how to install plugin from tarball ?

99% of the time you just need to untar it into vendor/plugins. Some
plugins have an install.rb that you should run.
You may be interested in the templates feature in rails 2.3