Process for Installing com_esearch is basically a standard Joomla compoment installation.

Com_esearch requires a (helper) bot that provides Smarty templates to joomla compoments.  

The Smarty bot is a modification of bot_tmplSmarty-0.1.0 - with the ability to load a template from a database field  added.

This can be loaded from the Tnrsearch download area . 

And do not forget to publish the Mambot after installing it.