Apache 1.3 URL Rewriting Guide

Here you can see mod_rewrite reference documentation. It describes how one can use Apache's mod_rewrite to solve typical URL-based problems with which webmasters are often confronted. We give detailed descriptions on how to solve each problem by configuring URL rewriting rulesets.

URL:http://httpd.apache.org/docs/1.3/misc/rewriteguide.html

PHP4 & PHP5 in same apache

Here You can see the ppt of How to Run PHP4 & PHP5 in same apache
http://www.deanspot.org/~alex/php5fcgi/index.html

Why Ruby on Rails-Presentation